21089995

素因数分解:

$5^1\times {\mathrm{43}}^1\times {\mathrm{233}}^1\times {\mathrm{421}}^1$

素因数の和:702

約数の個数: 16

約数和(自身を含む): 26069472

約数和(自身を除く): 4979477

約数列:

[1, 5, 43, 215, 233, 421, 1165, 2105, 10019, 18103, 50095, 90515, 98093, 490465, 4217999, 21089995]

約数ペア:

[(1, 21089995), (5, 4217999), (43, 490465), (215, 98093), (233, 90515), (421, 50095), (1165, 18103), (2105, 10019)]