21204585

素因数分解:

$3^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{1277}}^1$

素因数の和:1335

約数の個数: 40

約数和(自身を含む): 38968776

約数和(自身を除く): 17764191

約数列:

[1, 3, 5, 9, 15, 27, 41, 45, 81, 123, 135, 205, 369, 405, 615, 1107, 1277, 1845, 3321, 3831, 5535, 6385, 11493, 16605, 19155, 34479, 52357, 57465, 103437, 157071, 172395, 261785, 471213, 517185, 785355, 1413639, 2356065, 4240917, 7068195, 21204585]

約数ペア:

[(1, 21204585), (3, 7068195), (5, 4240917), (9, 2356065), (15, 1413639), (27, 785355), (41, 517185), (45, 471213), (81, 261785), (123, 172395), (135, 157071), (205, 103437), (369, 57465), (405, 52357), (615, 34479), (1107, 19155), (1277, 16605), (1845, 11493), (3321, 6385), (3831, 5535)]