21258615

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{293}}^1\times {\mathrm{691}}^1$

素因数の和:999

約数の個数: 32

約数和(自身を含む): 39062016

約数和(自身を除く): 17803401

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 293, 691, 879, 1465, 2051, 2073, 3455, 4395, 4837, 6153, 10255, 10365, 14511, 24185, 30765, 72555, 202463, 607389, 1012315, 1417241, 3036945, 4251723, 7086205, 21258615]

約数ペア:

[(1, 21258615), (3, 7086205), (5, 4251723), (7, 3036945), (15, 1417241), (21, 1012315), (35, 607389), (105, 202463), (293, 72555), (691, 30765), (879, 24185), (1465, 14511), (2051, 10365), (2073, 10255), (3455, 6153), (4395, 4837)]