20401850

素因数分解:

$2^1\times 5^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{821}}^1$

素因数の和:911

約数の個数: 48

約数和(自身を含む): 44032896

約数和(自身を除く): 23631046

約数列:

[1, 2, 5, 7, 10, 14, 25, 35, 50, 70, 71, 142, 175, 350, 355, 497, 710, 821, 994, 1642, 1775, 2485, 3550, 4105, 4970, 5747, 8210, 11494, 12425, 20525, 24850, 28735, 41050, 57470, 58291, 116582, 143675, 287350, 291455, 408037, 582910, 816074, 1457275, 2040185, 2914550, 4080370, 10200925, 20401850]

約数ペア:

[(1, 20401850), (2, 10200925), (5, 4080370), (7, 2914550), (10, 2040185), (14, 1457275), (25, 816074), (35, 582910), (50, 408037), (70, 291455), (71, 287350), (142, 143675), (175, 116582), (350, 58291), (355, 57470), (497, 41050), (710, 28735), (821, 24850), (994, 20525), (1642, 12425), (1775, 11494), (2485, 8210), (3550, 5747), (4105, 4970)]