21380509

素因数分解:

${\mathrm{17}}^2\times {\mathrm{167}}^1\times {\mathrm{443}}^1$

素因数の和:644

約数の個数: 12

約数和(自身を含む): 22899744

約数和(自身を除く): 1519235

約数列:

[1, 17, 167, 289, 443, 2839, 7531, 48263, 73981, 128027, 1257677, 21380509]

約数ペア:

[(1, 21380509), (17, 1257677), (167, 128027), (289, 73981), (443, 48263), (2839, 7531)]