25648040

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{821}}^1$

素因数の和:914

約数の個数: 64

約数和(自身を含む): 63918720

約数和(自身を除く): 38270680

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 71, 88, 110, 142, 220, 284, 355, 440, 568, 710, 781, 821, 1420, 1562, 1642, 2840, 3124, 3284, 3905, 4105, 6248, 6568, 7810, 8210, 9031, 15620, 16420, 18062, 31240, 32840, 36124, 45155, 58291, 72248, 90310, 116582, 180620, 233164, 291455, 361240, 466328, 582910, 641201, 1165820, 1282402, 2331640, 2564804, 3206005, 5129608, 6412010, 12824020, 25648040]

約数ペア:

[(1, 25648040), (2, 12824020), (4, 6412010), (5, 5129608), (8, 3206005), (10, 2564804), (11, 2331640), (20, 1282402), (22, 1165820), (40, 641201), (44, 582910), (55, 466328), (71, 361240), (88, 291455), (110, 233164), (142, 180620), (220, 116582), (284, 90310), (355, 72248), (440, 58291), (568, 45155), (710, 36124), (781, 32840), (821, 31240), (1420, 18062), (1562, 16420), (1642, 15620), (2840, 9031), (3124, 8210), (3284, 7810), (3905, 6568), (4105, 6248)]