20119775

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{1997}}^1$

素因数の和:2051

約数の個数: 24

約数和(自身を含む): 27748224

約数和(自身を除く): 7628449

約数列:

[1, 5, 13, 25, 31, 65, 155, 325, 403, 775, 1997, 2015, 9985, 10075, 25961, 49925, 61907, 129805, 309535, 649025, 804791, 1547675, 4023955, 20119775]

約数ペア:

[(1, 20119775), (5, 4023955), (13, 1547675), (25, 804791), (31, 649025), (65, 309535), (155, 129805), (325, 61907), (403, 49925), (775, 25961), (1997, 10075), (2015, 9985)]