3999775

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{397}}^1$

素因数の和:451

約数の個数: 24

約数和(自身を含む): 5527424

約数和(自身を除く): 1527649

約数列:

[1, 5, 13, 25, 31, 65, 155, 325, 397, 403, 775, 1985, 2015, 5161, 9925, 10075, 12307, 25805, 61535, 129025, 159991, 307675, 799955, 3999775]

約数ペア:

[(1, 3999775), (5, 799955), (13, 307675), (25, 159991), (31, 129025), (65, 61535), (155, 25805), (325, 12307), (397, 10075), (403, 9925), (775, 5161), (1985, 2015)]