21781256

素因数分解:

$2^3\times 7^1\times {\mathrm{101}}^1\times {\mathrm{3851}}^1$

素因数の和:3965

約数の個数: 32

約数和(自身を含む): 47148480

約数和(自身を除く): 25367224

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 101, 202, 404, 707, 808, 1414, 2828, 3851, 5656, 7702, 15404, 26957, 30808, 53914, 107828, 215656, 388951, 777902, 1555804, 2722657, 3111608, 5445314, 10890628, 21781256]

約数ペア:

[(1, 21781256), (2, 10890628), (4, 5445314), (7, 3111608), (8, 2722657), (14, 1555804), (28, 777902), (56, 388951), (101, 215656), (202, 107828), (404, 53914), (707, 30808), (808, 26957), (1414, 15404), (2828, 7702), (3851, 5656)]