21720595

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{151}}^1\times {\mathrm{2213}}^1$

素因数の和:2382

約数の個数: 16

約数和(自身を含む): 28268352

約数和(自身を除く): 6547757

約数列:

[1, 5, 13, 65, 151, 755, 1963, 2213, 9815, 11065, 28769, 143845, 334163, 1670815, 4344119, 21720595]

約数ペア:

[(1, 21720595), (5, 4344119), (13, 1670815), (65, 334163), (151, 143845), (755, 28769), (1963, 11065), (2213, 9815)]