21250663

素因数分解:

$7^2\times {\mathrm{17}}^1\times {\mathrm{97}}^1\times {\mathrm{263}}^1$

素因数の和:391

約数の個数: 24

約数和(自身を含む): 26544672

約数和(自身を除く): 5294009

約数列:

[1, 7, 17, 49, 97, 119, 263, 679, 833, 1649, 1841, 4471, 4753, 11543, 12887, 25511, 31297, 80801, 178577, 219079, 433687, 1250039, 3035809, 21250663]

約数ペア:

[(1, 21250663), (7, 3035809), (17, 1250039), (49, 433687), (97, 219079), (119, 178577), (263, 80801), (679, 31297), (833, 25511), (1649, 12887), (1841, 11543), (4471, 4753)]