21205256

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{155921}}^1$

素因数の和:155944

約数の個数: 16

約数和(自身を含む): 42098940

約数和(自身を除く): 20893684

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 155921, 311842, 623684, 1247368, 2650657, 5301314, 10602628, 21205256]

約数ペア:

[(1, 21205256), (2, 10602628), (4, 5301314), (8, 2650657), (17, 1247368), (34, 623684), (68, 311842), (136, 155921)]