21781886

素因数分解:

$2^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{21313}}^1$

素因数の和:21395

約数の個数: 16

約数和(自身を含む): 37853664

約数和(自身を除く): 16071778

約数列:

[1, 2, 7, 14, 73, 146, 511, 1022, 21313, 42626, 149191, 298382, 1555849, 3111698, 10890943, 21781886]

約数ペア:

[(1, 21781886), (2, 10890943), (7, 3111698), (14, 1555849), (73, 298382), (146, 149191), (511, 42626), (1022, 21313)]