259985375

素因数分解:

$5^3\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{397}}^1$

素因数の和:469

約数の個数: 48

約数和(自身を含む): 363587328

約数和(自身を除く): 103601953

約数列:

[1, 5, 13, 25, 31, 65, 125, 155, 169, 325, 397, 403, 775, 845, 1625, 1985, 2015, 3875, 4225, 5161, 5239, 9925, 10075, 12307, 21125, 25805, 26195, 49625, 50375, 61535, 67093, 129025, 130975, 159991, 307675, 335465, 645125, 654875, 799955, 1538375, 1677325, 2079883, 3999775, 8386625, 10399415, 19998875, 51997075, 259985375]

約数ペア:

[(1, 259985375), (5, 51997075), (13, 19998875), (25, 10399415), (31, 8386625), (65, 3999775), (125, 2079883), (155, 1677325), (169, 1538375), (325, 799955), (397, 654875), (403, 645125), (775, 335465), (845, 307675), (1625, 159991), (1985, 130975), (2015, 129025), (3875, 67093), (4225, 61535), (5161, 50375), (5239, 49625), (9925, 26195), (10075, 25805), (12307, 21125)]