20507760

素因数分解:

$2^4\times 3^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{313}}^1$

素因数の和:352

約数の個数: 240

約数和(自身を含む): 85036224

約数和(自身を除く): 64528464

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14, 15, 16, 18, 20, 21, 24, 26, 28, 30, 35, 36, 39, 40, 42, 45, 48, 52, 56, 60, 63, 65, 70, 72, 78, 80, 84, 90, 91, 104, 105, 112, 117, 120, 126, 130, 140, 144, 156, 168, 180, 182, 195, 208, 210, 234, 240, 252, 260, 273, 280, 312, 313, 315, 336, 360, 364, 390, 420, 455, 468, 504, 520, 546, 560, 585, 624, 626, 630, 720, 728, 780, 819, 840, 910, 936, 939, 1008, 1040, 1092, 1170, 1252, 1260, 1365, 1456, 1560, 1565, 1638, 1680, 1820, 1872, 1878, 2184, 2191, 2340, 2504, 2520, 2730, 2817, 3120, 3130, 3276, 3640, 3756, 4069, 4095, 4368, 4382, 4680, 4695, 5008, 5040, 5460, 5634, 6260, 6552, 6573, 7280, 7512, 8138, 8190, 8764, 9360, 9390, 10920, 10955, 11268, 12207, 12520, 13104, 13146, 14085, 15024, 16276, 16380, 17528, 18780, 19719, 20345, 21840, 21910, 22536, 24414, 25040, 26292, 28170, 28483, 32552, 32760, 32865, 35056, 36621, 37560, 39438, 40690, 43820, 45072, 48828, 52584, 56340, 56966, 61035, 65104, 65520, 65730, 73242, 75120, 78876, 81380, 85449, 87640, 97656, 98595, 105168, 112680, 113932, 122070, 131460, 142415, 146484, 157752, 162760, 170898, 175280, 183105, 195312, 197190, 225360, 227864, 244140, 256347, 262920, 284830, 292968, 315504, 325520, 341796, 366210, 394380, 427245, 455728, 488280, 512694, 525840, 569660, 585936, 683592, 732420, 788760, 854490, 976560, 1025388, 1139320, 1281735, 1367184, 1464840, 1577520, 1708980, 2050776, 2278640, 2563470, 2929680, 3417960, 4101552, 5126940, 6835920, 10253880, 20507760]

約数ペア:

[(1, 20507760), (2, 10253880), (3, 6835920), (4, 5126940), (5, 4101552), (6, 3417960), (7, 2929680), (8, 2563470), (9, 2278640), (10, 2050776), (12, 1708980), (13, 1577520), (14, 1464840), (15, 1367184), (16, 1281735), (18, 1139320), (20, 1025388), (21, 976560), (24, 854490), (26, 788760), (28, 732420), (30, 683592), (35, 585936), (36, 569660), (39, 525840), (40, 512694), (42, 488280), (45, 455728), (48, 427245), (52, 394380), (56, 366210), (60, 341796), (63, 325520), (65, 315504), (70, 292968), (72, 284830), (78, 262920), (80, 256347), (84, 244140), (90, 227864), (91, 225360), (104, 197190), (105, 195312), (112, 183105), (117, 175280), (120, 170898), (126, 162760), (130, 157752), (140, 146484), (144, 142415), (156, 131460), (168, 122070), (180, 113932), (182, 112680), (195, 105168), (208, 98595), (210, 97656), (234, 87640), (240, 85449), (252, 81380), (260, 78876), (273, 75120), (280, 73242), (312, 65730), (313, 65520), (315, 65104), (336, 61035), (360, 56966), (364, 56340), (390, 52584), (420, 48828), (455, 45072), (468, 43820), (504, 40690), (520, 39438), (546, 37560), (560, 36621), (585, 35056), (624, 32865), (626, 32760), (630, 32552), (720, 28483), (728, 28170), (780, 26292), (819, 25040), (840, 24414), (910, 22536), (936, 21910), (939, 21840), (1008, 20345), (1040, 19719), (1092, 18780), (1170, 17528), (1252, 16380), (1260, 16276), (1365, 15024), (1456, 14085), (1560, 13146), (1565, 13104), (1638, 12520), (1680, 12207), (1820, 11268), (1872, 10955), (1878, 10920), (2184, 9390), (2191, 9360), (2340, 8764), (2504, 8190), (2520, 8138), (2730, 7512), (2817, 7280), (3120, 6573), (3130, 6552), (3276, 6260), (3640, 5634), (3756, 5460), (4069, 5040), (4095, 5008), (4368, 4695), (4382, 4680)]