21870145

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{37}}^1\times {\mathrm{977}}^1$

素因数の和:1041

約数の個数: 24

約数和(自身を含む): 29656872

約数和(自身を除く): 7786727

約数列:

[1, 5, 11, 37, 55, 121, 185, 407, 605, 977, 2035, 4477, 4885, 10747, 22385, 36149, 53735, 118217, 180745, 397639, 591085, 1988195, 4374029, 21870145]

約数ペア:

[(1, 21870145), (5, 4374029), (11, 1988195), (37, 591085), (55, 397639), (121, 180745), (185, 118217), (407, 53735), (605, 36149), (977, 22385), (2035, 10747), (4477, 4885)]