394811980

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{249881}}^1$

素因数の和:249969

約数の個数: 24

約数和(自身を含む): 839603520

約数和(自身を除く): 444791540

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 249881, 499762, 999524, 1249405, 2498810, 4997620, 19740599, 39481198, 78962396, 98702995, 197405990, 394811980]

約数ペア:

[(1, 394811980), (2, 197405990), (4, 98702995), (5, 78962396), (10, 39481198), (20, 19740599), (79, 4997620), (158, 2498810), (316, 1249405), (395, 999524), (790, 499762), (1580, 249881)]