20805428

素因数分解:

$2^2\times 7^1\times {\mathrm{239}}^1\times {\mathrm{3109}}^1$

素因数の和:3359

約数の個数: 24

約数和(自身を含む): 41798400

約数和(自身を除く): 20992972

約数列:

[1, 2, 4, 7, 14, 28, 239, 478, 956, 1673, 3109, 3346, 6218, 6692, 12436, 21763, 43526, 87052, 743051, 1486102, 2972204, 5201357, 10402714, 20805428]

約数ペア:

[(1, 20805428), (2, 10402714), (4, 5201357), (7, 2972204), (14, 1486102), (28, 743051), (239, 87052), (478, 43526), (956, 21763), (1673, 12436), (3109, 6692), (3346, 6218)]