639585

素因数分解:

$3^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{233}}^1$

素因数の和:305

約数の個数: 24

約数和(自身を含む): 1131624

約数和(自身を除く): 492039

約数列:

[1, 3, 5, 9, 15, 45, 61, 183, 233, 305, 549, 699, 915, 1165, 2097, 2745, 3495, 10485, 14213, 42639, 71065, 127917, 213195, 639585]

約数ペア:

[(1, 639585), (3, 213195), (5, 127917), (9, 71065), (15, 42639), (45, 14213), (61, 10485), (183, 3495), (233, 2745), (305, 2097), (549, 1165), (699, 915)]