12990965

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{157}}^1$

素因数の和:261

約数の個数: 32

約数和(自身を含む): 18049920

約数和(自身を除く): 5058955

約数列:

[1, 5, 13, 19, 65, 67, 95, 157, 247, 335, 785, 871, 1235, 1273, 2041, 2983, 4355, 6365, 10205, 10519, 14915, 16549, 38779, 52595, 82745, 136747, 193895, 199861, 683735, 999305, 2598193, 12990965]

約数ペア:

[(1, 12990965), (5, 2598193), (13, 999305), (19, 683735), (65, 199861), (67, 193895), (95, 136747), (157, 82745), (247, 52595), (335, 38779), (785, 16549), (871, 14915), (1235, 10519), (1273, 10205), (2041, 6365), (2983, 4355)]