21353320

素因数分解:

$2^3\times 5^1\times {\mathrm{359}}^1\times {\mathrm{1487}}^1$

素因数の和:1857

約数の個数: 32

約数和(自身を含む): 48211200

約数和(自身を除く): 26857880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 359, 718, 1436, 1487, 1795, 2872, 2974, 3590, 5948, 7180, 7435, 11896, 14360, 14870, 29740, 59480, 533833, 1067666, 2135332, 2669165, 4270664, 5338330, 10676660, 21353320]

約数ペア:

[(1, 21353320), (2, 10676660), (4, 5338330), (5, 4270664), (8, 2669165), (10, 2135332), (20, 1067666), (40, 533833), (359, 59480), (718, 29740), (1436, 14870), (1487, 14360), (1795, 11896), (2872, 7435), (2974, 7180), (3590, 5948)]