21125727

素因数分解:

$3^2\times 7^1\times {\mathrm{97}}^1\times {\mathrm{3457}}^1$

素因数の和:3567

約数の個数: 24

約数和(自身を含む): 35243936

約数和(自身を除く): 14118209

約数列:

[1, 3, 7, 9, 21, 63, 97, 291, 679, 873, 2037, 3457, 6111, 10371, 24199, 31113, 72597, 217791, 335329, 1005987, 2347303, 3017961, 7041909, 21125727]

約数ペア:

[(1, 21125727), (3, 7041909), (7, 3017961), (9, 2347303), (21, 1005987), (63, 335329), (97, 217791), (291, 72597), (679, 31113), (873, 24199), (2037, 10371), (3457, 6111)]