21127785

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{311}}^1\times {\mathrm{647}}^1$

素因数の和:973

約数の個数: 32

約数和(自身を含む): 38817792

約数和(自身を除く): 17690007

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 311, 647, 933, 1555, 1941, 2177, 3235, 4529, 4665, 6531, 9705, 10885, 13587, 22645, 32655, 67935, 201217, 603651, 1006085, 1408519, 3018255, 4225557, 7042595, 21127785]

約数ペア:

[(1, 21127785), (3, 7042595), (5, 4225557), (7, 3018255), (15, 1408519), (21, 1006085), (35, 603651), (105, 201217), (311, 67935), (647, 32655), (933, 22645), (1555, 13587), (1941, 10885), (2177, 9705), (3235, 6531), (4529, 4665)]