21071428

素因数分解:

$2^2\times 7^1\times {\mathrm{101}}^1\times {\mathrm{7451}}^1$

素因数の和:7563

約数の個数: 24

約数和(自身を含む): 42565824

約数和(自身を除く): 21494396

約数列:

[1, 2, 4, 7, 14, 28, 101, 202, 404, 707, 1414, 2828, 7451, 14902, 29804, 52157, 104314, 208628, 752551, 1505102, 3010204, 5267857, 10535714, 21071428]

約数ペア:

[(1, 21071428), (2, 10535714), (4, 5267857), (7, 3010204), (14, 1505102), (28, 752551), (101, 208628), (202, 104314), (404, 52157), (707, 29804), (1414, 14902), (2828, 7451)]