21625405

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{4001}}^1$

素因数の和:4076

約数の個数: 16

約数和(自身を含む): 27661824

約数和(自身を除く): 6036419

約数列:

[1, 5, 23, 47, 115, 235, 1081, 4001, 5405, 20005, 92023, 188047, 460115, 940235, 4325081, 21625405]

約数ペア:

[(1, 21625405), (5, 4325081), (23, 940235), (47, 460115), (115, 188047), (235, 92023), (1081, 20005), (4001, 5405)]