21705724

素因数分解:

$2^2\times {\mathrm{79}}^1\times {\mathrm{149}}^1\times {\mathrm{461}}^1$

素因数の和:693

約数の個数: 24

約数和(自身を含む): 38808000

約数和(自身を除く): 17102276

約数列:

[1, 2, 4, 79, 149, 158, 298, 316, 461, 596, 922, 1844, 11771, 23542, 36419, 47084, 68689, 72838, 137378, 145676, 274756, 5426431, 10852862, 21705724]

約数ペア:

[(1, 21705724), (2, 10852862), (4, 5426431), (79, 274756), (149, 145676), (158, 137378), (298, 72838), (316, 68689), (461, 47084), (596, 36419), (922, 23542), (1844, 11771)]