20128580

素因数分解:

$2^2\times 5^1\times {\mathrm{239}}^1\times {\mathrm{4211}}^1$

素因数の和:4459

約数の個数: 24

約数和(自身を含む): 42456960

約数和(自身を除く): 22328380

約数列:

[1, 2, 4, 5, 10, 20, 239, 478, 956, 1195, 2390, 4211, 4780, 8422, 16844, 21055, 42110, 84220, 1006429, 2012858, 4025716, 5032145, 10064290, 20128580]

約数ペア:

[(1, 20128580), (2, 10064290), (4, 5032145), (5, 4025716), (10, 2012858), (20, 1006429), (239, 84220), (478, 42110), (956, 21055), (1195, 16844), (2390, 8422), (4211, 4780)]