18172975

素因数分解:

$5^2\times {\mathrm{31}}^1\times {\mathrm{131}}^1\times {\mathrm{179}}^1$

素因数の和:351

約数の個数: 24

約数和(自身を含む): 23569920

約数和(自身を除く): 5396945

約数列:

[1, 5, 25, 31, 131, 155, 179, 655, 775, 895, 3275, 4061, 4475, 5549, 20305, 23449, 27745, 101525, 117245, 138725, 586225, 726919, 3634595, 18172975]

約数ペア:

[(1, 18172975), (5, 3634595), (25, 726919), (31, 586225), (131, 138725), (155, 117245), (179, 101525), (655, 27745), (775, 23449), (895, 20305), (3275, 5549), (4061, 4475)]