21545775

素因数分解:

$3^2\times 5^2\times {\mathrm{31}}^1\times {\mathrm{3089}}^1$

素因数の和:3136

約数の個数: 36

約数和(自身を含む): 39848640

約数和(自身を除く): 18302865

約数列:

[1, 3, 5, 9, 15, 25, 31, 45, 75, 93, 155, 225, 279, 465, 775, 1395, 2325, 3089, 6975, 9267, 15445, 27801, 46335, 77225, 95759, 139005, 231675, 287277, 478795, 695025, 861831, 1436385, 2393975, 4309155, 7181925, 21545775]

約数ペア:

[(1, 21545775), (3, 7181925), (5, 4309155), (9, 2393975), (15, 1436385), (25, 861831), (31, 695025), (45, 478795), (75, 287277), (93, 231675), (155, 139005), (225, 95759), (279, 77225), (465, 46335), (775, 27801), (1395, 15445), (2325, 9267), (3089, 6975)]