20128920

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{773}}^1$

素因数の和:825

約数の個数: 128

約数和(自身を含む): 71331840

約数和(自身を除く): 51202920

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 31, 35, 40, 42, 56, 60, 62, 70, 84, 93, 105, 120, 124, 140, 155, 168, 186, 210, 217, 248, 280, 310, 372, 420, 434, 465, 620, 651, 744, 773, 840, 868, 930, 1085, 1240, 1302, 1546, 1736, 1860, 2170, 2319, 2604, 3092, 3255, 3720, 3865, 4340, 4638, 5208, 5411, 6184, 6510, 7730, 8680, 9276, 10822, 11595, 13020, 15460, 16233, 18552, 21644, 23190, 23963, 26040, 27055, 30920, 32466, 43288, 46380, 47926, 54110, 64932, 71889, 81165, 92760, 95852, 108220, 119815, 129864, 143778, 162330, 167741, 191704, 216440, 239630, 287556, 324660, 335482, 359445, 479260, 503223, 575112, 649320, 670964, 718890, 838705, 958520, 1006446, 1341928, 1437780, 1677410, 2012892, 2516115, 2875560, 3354820, 4025784, 5032230, 6709640, 10064460, 20128920]

約数ペア:

[(1, 20128920), (2, 10064460), (3, 6709640), (4, 5032230), (5, 4025784), (6, 3354820), (7, 2875560), (8, 2516115), (10, 2012892), (12, 1677410), (14, 1437780), (15, 1341928), (20, 1006446), (21, 958520), (24, 838705), (28, 718890), (30, 670964), (31, 649320), (35, 575112), (40, 503223), (42, 479260), (56, 359445), (60, 335482), (62, 324660), (70, 287556), (84, 239630), (93, 216440), (105, 191704), (120, 167741), (124, 162330), (140, 143778), (155, 129864), (168, 119815), (186, 108220), (210, 95852), (217, 92760), (248, 81165), (280, 71889), (310, 64932), (372, 54110), (420, 47926), (434, 46380), (465, 43288), (620, 32466), (651, 30920), (744, 27055), (773, 26040), (840, 23963), (868, 23190), (930, 21644), (1085, 18552), (1240, 16233), (1302, 15460), (1546, 13020), (1736, 11595), (1860, 10822), (2170, 9276), (2319, 8680), (2604, 7730), (3092, 6510), (3255, 6184), (3720, 5411), (3865, 5208), (4340, 4638)]