20517225

素因数分解:

$3^1\times 5^2\times {\mathrm{71}}^1\times {\mathrm{3853}}^1$

素因数の和:3937

約数の個数: 24

約数和(自身を含む): 34408512

約数和(自身を除く): 13891287

約数列:

[1, 3, 5, 15, 25, 71, 75, 213, 355, 1065, 1775, 3853, 5325, 11559, 19265, 57795, 96325, 273563, 288975, 820689, 1367815, 4103445, 6839075, 20517225]

約数ペア:

[(1, 20517225), (3, 6839075), (5, 4103445), (15, 1367815), (25, 820689), (71, 288975), (75, 273563), (213, 96325), (355, 57795), (1065, 19265), (1775, 11559), (3853, 5325)]