20391225

素因数分解:

$3^1\times 5^2\times {\mathrm{23}}^1\times {\mathrm{11821}}^1$

素因数の和:11857

約数の個数: 24

約数和(自身を含む): 35182272

約数和(自身を除く): 14791047

約数列:

[1, 3, 5, 15, 23, 25, 69, 75, 115, 345, 575, 1725, 11821, 35463, 59105, 177315, 271883, 295525, 815649, 886575, 1359415, 4078245, 6797075, 20391225]

約数ペア:

[(1, 20391225), (3, 6797075), (5, 4078245), (15, 1359415), (23, 886575), (25, 815649), (69, 295525), (75, 271883), (115, 177315), (345, 59105), (575, 35463), (1725, 11821)]