21261328

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{107}}^1\times {\mathrm{1129}}^1$

素因数の和:1255

約数の個数: 40

約数和(自身を含む): 45398880

約数和(自身を除く): 24137552

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 88, 107, 176, 214, 428, 856, 1129, 1177, 1712, 2258, 2354, 4516, 4708, 9032, 9416, 12419, 18064, 18832, 24838, 49676, 99352, 120803, 198704, 241606, 483212, 966424, 1328833, 1932848, 2657666, 5315332, 10630664, 21261328]

約数ペア:

[(1, 21261328), (2, 10630664), (4, 5315332), (8, 2657666), (11, 1932848), (16, 1328833), (22, 966424), (44, 483212), (88, 241606), (107, 198704), (176, 120803), (214, 99352), (428, 49676), (856, 24838), (1129, 18832), (1177, 18064), (1712, 12419), (2258, 9416), (2354, 9032), (4516, 4708)]