20517840

素因数分解:

$2^4\times 3^3\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1$

素因数の和:111

約数の個数: 320

約数和(自身を含む): 85708800

約数和(自身を除く): 65190960

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 23, 24, 27, 28, 30, 35, 36, 40, 42, 45, 46, 48, 54, 56, 59, 60, 63, 69, 70, 72, 80, 84, 90, 92, 105, 108, 112, 115, 118, 120, 126, 135, 138, 140, 144, 161, 168, 177, 180, 184, 189, 207, 210, 216, 230, 236, 240, 252, 270, 276, 280, 295, 315, 322, 336, 345, 354, 360, 368, 378, 413, 414, 420, 432, 460, 472, 483, 504, 531, 540, 552, 560, 590, 621, 630, 644, 690, 708, 720, 756, 805, 826, 828, 840, 885, 920, 944, 945, 966, 1008, 1035, 1062, 1080, 1104, 1180, 1239, 1242, 1260, 1288, 1357, 1380, 1416, 1449, 1512, 1593, 1610, 1652, 1656, 1680, 1770, 1840, 1890, 1932, 2065, 2070, 2124, 2160, 2360, 2415, 2478, 2484, 2520, 2576, 2655, 2714, 2760, 2832, 2898, 3024, 3105, 3186, 3220, 3304, 3312, 3540, 3717, 3780, 3864, 4071, 4130, 4140, 4248, 4347, 4720, 4830, 4956, 4968, 5040, 5310, 5428, 5520, 5796, 6195, 6210, 6372, 6440, 6608, 6785, 7080, 7245, 7434, 7560, 7728, 7965, 8142, 8260, 8280, 8496, 8694, 9499, 9660, 9912, 9936, 10620, 10856, 11151, 11592, 12213, 12390, 12420, 12744, 12880, 13570, 14160, 14490, 14868, 15120, 15930, 16284, 16520, 16560, 17388, 18585, 18998, 19320, 19824, 20355, 21240, 21712, 21735, 22302, 23184, 24426, 24780, 24840, 25488, 27140, 28497, 28980, 29736, 31860, 32568, 33040, 34776, 36639, 37170, 37996, 38640, 40710, 42480, 43470, 44604, 47495, 48852, 49560, 49680, 54280, 55755, 56994, 57960, 59472, 61065, 63720, 65136, 69552, 73278, 74340, 75992, 81420, 85491, 86940, 89208, 94990, 97704, 99120, 108560, 111510, 113988, 115920, 122130, 127440, 142485, 146556, 148680, 151984, 162840, 170982, 173880, 178416, 183195, 189980, 195408, 223020, 227976, 244260, 256473, 284970, 293112, 297360, 325680, 341964, 347760, 366390, 379960, 427455, 446040, 455952, 488520, 512946, 569940, 586224, 683928, 732780, 759920, 854910, 892080, 977040, 1025892, 1139880, 1282365, 1367856, 1465560, 1709820, 2051784, 2279760, 2564730, 2931120, 3419640, 4103568, 5129460, 6839280, 10258920, 20517840]

約数ペア:

[(1, 20517840), (2, 10258920), (3, 6839280), (4, 5129460), (5, 4103568), (6, 3419640), (7, 2931120), (8, 2564730), (9, 2279760), (10, 2051784), (12, 1709820), (14, 1465560), (15, 1367856), (16, 1282365), (18, 1139880), (20, 1025892), (21, 977040), (23, 892080), (24, 854910), (27, 759920), (28, 732780), (30, 683928), (35, 586224), (36, 569940), (40, 512946), (42, 488520), (45, 455952), (46, 446040), (48, 427455), (54, 379960), (56, 366390), (59, 347760), (60, 341964), (63, 325680), (69, 297360), (70, 293112), (72, 284970), (80, 256473), (84, 244260), (90, 227976), (92, 223020), (105, 195408), (108, 189980), (112, 183195), (115, 178416), (118, 173880), (120, 170982), (126, 162840), (135, 151984), (138, 148680), (140, 146556), (144, 142485), (161, 127440), (168, 122130), (177, 115920), (180, 113988), (184, 111510), (189, 108560), (207, 99120), (210, 97704), (216, 94990), (230, 89208), (236, 86940), (240, 85491), (252, 81420), (270, 75992), (276, 74340), (280, 73278), (295, 69552), (315, 65136), (322, 63720), (336, 61065), (345, 59472), (354, 57960), (360, 56994), (368, 55755), (378, 54280), (413, 49680), (414, 49560), (420, 48852), (432, 47495), (460, 44604), (472, 43470), (483, 42480), (504, 40710), (531, 38640), (540, 37996), (552, 37170), (560, 36639), (590, 34776), (621, 33040), (630, 32568), (644, 31860), (690, 29736), (708, 28980), (720, 28497), (756, 27140), (805, 25488), (826, 24840), (828, 24780), (840, 24426), (885, 23184), (920, 22302), (944, 21735), (945, 21712), (966, 21240), (1008, 20355), (1035, 19824), (1062, 19320), (1080, 18998), (1104, 18585), (1180, 17388), (1239, 16560), (1242, 16520), (1260, 16284), (1288, 15930), (1357, 15120), (1380, 14868), (1416, 14490), (1449, 14160), (1512, 13570), (1593, 12880), (1610, 12744), (1652, 12420), (1656, 12390), (1680, 12213), (1770, 11592), (1840, 11151), (1890, 10856), (1932, 10620), (2065, 9936), (2070, 9912), (2124, 9660), (2160, 9499), (2360, 8694), (2415, 8496), (2478, 8280), (2484, 8260), (2520, 8142), (2576, 7965), (2655, 7728), (2714, 7560), (2760, 7434), (2832, 7245), (2898, 7080), (3024, 6785), (3105, 6608), (3186, 6440), (3220, 6372), (3304, 6210), (3312, 6195), (3540, 5796), (3717, 5520), (3780, 5428), (3864, 5310), (4071, 5040), (4130, 4968), (4140, 4956), (4248, 4830), (4347, 4720)]