81396980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{581407}}^1$

素因数の和:581423

約数の個数: 24

約数和(自身を含む): 195353088

約数和(自身を除く): 113956108

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 581407, 1162814, 2325628, 2907035, 4069849, 5814070, 8139698, 11628140, 16279396, 20349245, 40698490, 81396980]

約数ペア:

[(1, 81396980), (2, 40698490), (4, 20349245), (5, 16279396), (7, 11628140), (10, 8139698), (14, 5814070), (20, 4069849), (28, 2907035), (35, 2325628), (70, 1162814), (140, 581407)]