394999580

素因数分解:

$2^2\times 5^1\times {\mathrm{19749979}}^1$

素因数の和:19749988

約数の個数: 12

約数和(自身を含む): 829499160

約数和(自身を除く): 434499580

約数列:

[1, 2, 4, 5, 10, 20, 19749979, 39499958, 78999916, 98749895, 197499790, 394999580]

約数ペア:

[(1, 394999580), (2, 197499790), (4, 98749895), (5, 78999916), (10, 39499958), (20, 19749979)]