21448125

素因数分解:

$3^3\times 5^4\times {\mathrm{31}}^1\times {\mathrm{41}}^1$

素因数の和:101

約数の個数: 80

約数和(自身を含む): 41986560

約数和(自身を除く): 20538435

約数列:

[1, 3, 5, 9, 15, 25, 27, 31, 41, 45, 75, 93, 123, 125, 135, 155, 205, 225, 279, 369, 375, 465, 615, 625, 675, 775, 837, 1025, 1107, 1125, 1271, 1395, 1845, 1875, 2325, 3075, 3375, 3813, 3875, 4185, 5125, 5535, 5625, 6355, 6975, 9225, 11439, 11625, 15375, 16875, 19065, 19375, 20925, 25625, 27675, 31775, 34317, 34875, 46125, 57195, 58125, 76875, 95325, 104625, 138375, 158875, 171585, 174375, 230625, 285975, 476625, 523125, 691875, 794375, 857925, 1429875, 2383125, 4289625, 7149375, 21448125]

約数ペア:

[(1, 21448125), (3, 7149375), (5, 4289625), (9, 2383125), (15, 1429875), (25, 857925), (27, 794375), (31, 691875), (41, 523125), (45, 476625), (75, 285975), (93, 230625), (123, 174375), (125, 171585), (135, 158875), (155, 138375), (205, 104625), (225, 95325), (279, 76875), (369, 58125), (375, 57195), (465, 46125), (615, 34875), (625, 34317), (675, 31775), (775, 27675), (837, 25625), (1025, 20925), (1107, 19375), (1125, 19065), (1271, 16875), (1395, 15375), (1845, 11625), (1875, 11439), (2325, 9225), (3075, 6975), (3375, 6355), (3813, 5625), (3875, 5535), (4185, 5125)]