21462920

素因数分解:

$2^3\times 5^1\times {\mathrm{211}}^1\times {\mathrm{2543}}^1$

素因数の和:2765

約数の個数: 32

約数和(自身を含む): 48539520

約数和(自身を除く): 27076600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 211, 422, 844, 1055, 1688, 2110, 2543, 4220, 5086, 8440, 10172, 12715, 20344, 25430, 50860, 101720, 536573, 1073146, 2146292, 2682865, 4292584, 5365730, 10731460, 21462920]

約数ペア:

[(1, 21462920), (2, 10731460), (4, 5365730), (5, 4292584), (8, 2682865), (10, 2146292), (20, 1073146), (40, 536573), (211, 101720), (422, 50860), (844, 25430), (1055, 20344), (1688, 12715), (2110, 10172), (2543, 8440), (4220, 5086)]