20986225

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{2083}}^1$

素因数の和:2137

約数の個数: 24

約数和(自身を含む): 28942592

約数和(自身を除く): 7956367

約数列:

[1, 5, 13, 25, 31, 65, 155, 325, 403, 775, 2015, 2083, 10075, 10415, 27079, 52075, 64573, 135395, 322865, 676975, 839449, 1614325, 4197245, 20986225]

約数ペア:

[(1, 20986225), (5, 4197245), (13, 1614325), (25, 839449), (31, 676975), (65, 322865), (155, 135395), (325, 64573), (403, 52075), (775, 27079), (2015, 10415), (2083, 10075)]