21263655

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{313}}^1\times {\mathrm{647}}^1$

素因数の和:975

約数の個数: 32

約数和(自身を含む): 39066624

約数和(自身を除く): 17802969

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 313, 647, 939, 1565, 1941, 2191, 3235, 4529, 4695, 6573, 9705, 10955, 13587, 22645, 32865, 67935, 202511, 607533, 1012555, 1417577, 3037665, 4252731, 7087885, 21263655]

約数ペア:

[(1, 21263655), (3, 7087885), (5, 4252731), (7, 3037665), (15, 1417577), (21, 1012555), (35, 607533), (105, 202511), (313, 67935), (647, 32865), (939, 22645), (1565, 13587), (1941, 10955), (2191, 9705), (3235, 6573), (4529, 4695)]