21689084

素因数分解:

$2^2\times {\mathrm{53}}^1\times {\mathrm{263}}^1\times {\mathrm{389}}^1$

素因数の和:709

約数の個数: 24

約数和(自身を含む): 38918880

約数和(自身を除く): 17229796

約数列:

[1, 2, 4, 53, 106, 212, 263, 389, 526, 778, 1052, 1556, 13939, 20617, 27878, 41234, 55756, 82468, 102307, 204614, 409228, 5422271, 10844542, 21689084]

約数ペア:

[(1, 21689084), (2, 10844542), (4, 5422271), (53, 409228), (106, 204614), (212, 102307), (263, 82468), (389, 55756), (526, 41234), (778, 27878), (1052, 20617), (1556, 13939)]