21587625

素因数分解:

$3^2\times 5^3\times {\mathrm{31}}^1\times {\mathrm{619}}^1$

素因数の和:671

約数の個数: 48

約数和(自身を含む): 40235520

約数和(自身を除く): 18647895

約数列:

[1, 3, 5, 9, 15, 25, 31, 45, 75, 93, 125, 155, 225, 279, 375, 465, 619, 775, 1125, 1395, 1857, 2325, 3095, 3875, 5571, 6975, 9285, 11625, 15475, 19189, 27855, 34875, 46425, 57567, 77375, 95945, 139275, 172701, 232125, 287835, 479725, 696375, 863505, 1439175, 2398625, 4317525, 7195875, 21587625]

約数ペア:

[(1, 21587625), (3, 7195875), (5, 4317525), (9, 2398625), (15, 1439175), (25, 863505), (31, 696375), (45, 479725), (75, 287835), (93, 232125), (125, 172701), (155, 139275), (225, 95945), (279, 77375), (375, 57567), (465, 46425), (619, 34875), (775, 27855), (1125, 19189), (1395, 15475), (1857, 11625), (2325, 9285), (3095, 6975), (3875, 5571)]