21000918064

素因数分解:

$2^4\times 7^1\times {\mathrm{1453}}^1\times {\mathrm{129049}}^1$

素因数の和:130517

約数の個数: 40

約数和(自身を含む): 46534397600

約数和(自身を除く): 25533479536

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 1453, 2906, 5812, 10171, 11624, 20342, 23248, 40684, 81368, 129049, 162736, 258098, 516196, 903343, 1032392, 1806686, 2064784, 3613372, 7226744, 14453488, 187508197, 375016394, 750032788, 1312557379, 1500065576, 2625114758, 3000131152, 5250229516, 10500459032, 21000918064]

約数ペア:

[(1, 21000918064), (2, 10500459032), (4, 5250229516), (7, 3000131152), (8, 2625114758), (14, 1500065576), (16, 1312557379), (28, 750032788), (56, 375016394), (112, 187508197), (1453, 14453488), (2906, 7226744), (5812, 3613372), (10171, 2064784), (11624, 1806686), (20342, 1032392), (23248, 903343), (40684, 516196), (81368, 258098), (129049, 162736)]