20078800

素因数分解:

$2^4\times 5^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{101}}^1$

素因数の和:197

約数の個数: 120

約数和(自身を含む): 56460672

約数和(自身を除く): 36381872

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 25, 28, 35, 40, 50, 56, 70, 71, 80, 100, 101, 112, 140, 142, 175, 200, 202, 280, 284, 350, 355, 400, 404, 497, 505, 560, 568, 700, 707, 710, 808, 994, 1010, 1136, 1400, 1414, 1420, 1616, 1775, 1988, 2020, 2485, 2525, 2800, 2828, 2840, 3535, 3550, 3976, 4040, 4970, 5050, 5656, 5680, 7070, 7100, 7171, 7952, 8080, 9940, 10100, 11312, 12425, 14140, 14200, 14342, 17675, 19880, 20200, 24850, 28280, 28400, 28684, 35350, 35855, 39760, 40400, 49700, 50197, 56560, 57368, 70700, 71710, 99400, 100394, 114736, 141400, 143420, 179275, 198800, 200788, 250985, 282800, 286840, 358550, 401576, 501970, 573680, 717100, 803152, 1003940, 1254925, 1434200, 2007880, 2509850, 2868400, 4015760, 5019700, 10039400, 20078800]

約数ペア:

[(1, 20078800), (2, 10039400), (4, 5019700), (5, 4015760), (7, 2868400), (8, 2509850), (10, 2007880), (14, 1434200), (16, 1254925), (20, 1003940), (25, 803152), (28, 717100), (35, 573680), (40, 501970), (50, 401576), (56, 358550), (70, 286840), (71, 282800), (80, 250985), (100, 200788), (101, 198800), (112, 179275), (140, 143420), (142, 141400), (175, 114736), (200, 100394), (202, 99400), (280, 71710), (284, 70700), (350, 57368), (355, 56560), (400, 50197), (404, 49700), (497, 40400), (505, 39760), (560, 35855), (568, 35350), (700, 28684), (707, 28400), (710, 28280), (808, 24850), (994, 20200), (1010, 19880), (1136, 17675), (1400, 14342), (1414, 14200), (1420, 14140), (1616, 12425), (1775, 11312), (1988, 10100), (2020, 9940), (2485, 8080), (2525, 7952), (2800, 7171), (2828, 7100), (2840, 7070), (3535, 5680), (3550, 5656), (3976, 5050), (4040, 4970)]