19955520

素因数分解:

$2^6\times 3^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{41}}^1$

素因数の和:90

約数の個数: 252

約数和(自身を含む): 76137516

約数和(自身を除く): 56181996

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 13, 15, 16, 18, 20, 24, 26, 30, 32, 36, 39, 40, 41, 45, 48, 52, 60, 64, 65, 72, 78, 80, 82, 90, 96, 104, 117, 120, 123, 130, 144, 156, 160, 164, 169, 180, 192, 195, 205, 208, 234, 240, 246, 260, 288, 312, 320, 328, 338, 360, 369, 390, 410, 416, 468, 480, 492, 507, 520, 533, 576, 585, 615, 624, 656, 676, 720, 738, 780, 820, 832, 845, 936, 960, 984, 1014, 1040, 1066, 1170, 1230, 1248, 1312, 1352, 1440, 1476, 1521, 1560, 1599, 1640, 1690, 1845, 1872, 1968, 2028, 2080, 2132, 2340, 2460, 2496, 2535, 2624, 2665, 2704, 2880, 2952, 3042, 3120, 3198, 3280, 3380, 3690, 3744, 3936, 4056, 4160, 4264, 4680, 4797, 4920, 5070, 5330, 5408, 5904, 6084, 6240, 6396, 6560, 6760, 6929, 7380, 7488, 7605, 7872, 7995, 8112, 8528, 9360, 9594, 9840, 10140, 10660, 10816, 11808, 12168, 12480, 12792, 13120, 13520, 13858, 14760, 15210, 15990, 16224, 17056, 18720, 19188, 19680, 20280, 20787, 21320, 23616, 23985, 24336, 25584, 27040, 27716, 29520, 30420, 31980, 32448, 34112, 34645, 37440, 38376, 39360, 40560, 41574, 42640, 47970, 48672, 51168, 54080, 55432, 59040, 60840, 62361, 63960, 69290, 76752, 81120, 83148, 85280, 95940, 97344, 102336, 103935, 110864, 118080, 121680, 124722, 127920, 138580, 153504, 162240, 166296, 170560, 191880, 207870, 221728, 243360, 249444, 255840, 277160, 307008, 311805, 332592, 383760, 415740, 443456, 486720, 498888, 511680, 554320, 623610, 665184, 767520, 831480, 997776, 1108640, 1247220, 1330368, 1535040, 1662960, 1995552, 2217280, 2494440, 3325920, 3991104, 4988880, 6651840, 9977760, 19955520]

約数ペア:

[(1, 19955520), (2, 9977760), (3, 6651840), (4, 4988880), (5, 3991104), (6, 3325920), (8, 2494440), (9, 2217280), (10, 1995552), (12, 1662960), (13, 1535040), (15, 1330368), (16, 1247220), (18, 1108640), (20, 997776), (24, 831480), (26, 767520), (30, 665184), (32, 623610), (36, 554320), (39, 511680), (40, 498888), (41, 486720), (45, 443456), (48, 415740), (52, 383760), (60, 332592), (64, 311805), (65, 307008), (72, 277160), (78, 255840), (80, 249444), (82, 243360), (90, 221728), (96, 207870), (104, 191880), (117, 170560), (120, 166296), (123, 162240), (130, 153504), (144, 138580), (156, 127920), (160, 124722), (164, 121680), (169, 118080), (180, 110864), (192, 103935), (195, 102336), (205, 97344), (208, 95940), (234, 85280), (240, 83148), (246, 81120), (260, 76752), (288, 69290), (312, 63960), (320, 62361), (328, 60840), (338, 59040), (360, 55432), (369, 54080), (390, 51168), (410, 48672), (416, 47970), (468, 42640), (480, 41574), (492, 40560), (507, 39360), (520, 38376), (533, 37440), (576, 34645), (585, 34112), (615, 32448), (624, 31980), (656, 30420), (676, 29520), (720, 27716), (738, 27040), (780, 25584), (820, 24336), (832, 23985), (845, 23616), (936, 21320), (960, 20787), (984, 20280), (1014, 19680), (1040, 19188), (1066, 18720), (1170, 17056), (1230, 16224), (1248, 15990), (1312, 15210), (1352, 14760), (1440, 13858), (1476, 13520), (1521, 13120), (1560, 12792), (1599, 12480), (1640, 12168), (1690, 11808), (1845, 10816), (1872, 10660), (1968, 10140), (2028, 9840), (2080, 9594), (2132, 9360), (2340, 8528), (2460, 8112), (2496, 7995), (2535, 7872), (2624, 7605), (2665, 7488), (2704, 7380), (2880, 6929), (2952, 6760), (3042, 6560), (3120, 6396), (3198, 6240), (3280, 6084), (3380, 5904), (3690, 5408), (3744, 5330), (3936, 5070), (4056, 4920), (4160, 4797), (4264, 4680)]