21390575

素因数分解:

$5^2\times {\mathrm{23}}^1\times {\mathrm{37201}}^1$

素因数の和:37234

約数の個数: 12

約数和(自身を含む): 27678288

約数和(自身を除く): 6287713

約数列:

[1, 5, 23, 25, 115, 575, 37201, 186005, 855623, 930025, 4278115, 21390575]

約数ペア:

[(1, 21390575), (5, 4278115), (23, 930025), (25, 855623), (115, 186005), (575, 37201)]