20714960

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{521}}^1$

素因数の和:612

約数の個数: 80

約数和(自身を含む): 55924992

約数和(自身を除く): 35210032

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 71, 80, 112, 140, 142, 280, 284, 355, 497, 521, 560, 568, 710, 994, 1042, 1136, 1420, 1988, 2084, 2485, 2605, 2840, 3647, 3976, 4168, 4970, 5210, 5680, 7294, 7952, 8336, 9940, 10420, 14588, 18235, 19880, 20840, 29176, 36470, 36991, 39760, 41680, 58352, 72940, 73982, 145880, 147964, 184955, 258937, 291760, 295928, 369910, 517874, 591856, 739820, 1035748, 1294685, 1479640, 2071496, 2589370, 2959280, 4142992, 5178740, 10357480, 20714960]

約数ペア:

[(1, 20714960), (2, 10357480), (4, 5178740), (5, 4142992), (7, 2959280), (8, 2589370), (10, 2071496), (14, 1479640), (16, 1294685), (20, 1035748), (28, 739820), (35, 591856), (40, 517874), (56, 369910), (70, 295928), (71, 291760), (80, 258937), (112, 184955), (140, 147964), (142, 145880), (280, 73982), (284, 72940), (355, 58352), (497, 41680), (521, 39760), (560, 36991), (568, 36470), (710, 29176), (994, 20840), (1042, 19880), (1136, 18235), (1420, 14588), (1988, 10420), (2084, 9940), (2485, 8336), (2605, 7952), (2840, 7294), (3647, 5680), (3976, 5210), (4168, 4970)]