12921640

素因数分解:

$2^3\times 5^1\times {\mathrm{211}}^1\times {\mathrm{1531}}^1$

素因数の和:1753

約数の個数: 32

約数和(自身を含む): 29230560

約数和(自身を除く): 16308920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 211, 422, 844, 1055, 1531, 1688, 2110, 3062, 4220, 6124, 7655, 8440, 12248, 15310, 30620, 61240, 323041, 646082, 1292164, 1615205, 2584328, 3230410, 6460820, 12921640]

約数ペア:

[(1, 12921640), (2, 6460820), (4, 3230410), (5, 2584328), (8, 1615205), (10, 1292164), (20, 646082), (40, 323041), (211, 61240), (422, 30620), (844, 15310), (1055, 12248), (1531, 8440), (1688, 7655), (2110, 6124), (3062, 4220)]