21085995

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{409}}^1\times {\mathrm{491}}^1$

素因数の和:915

約数の個数: 32

約数和(自身を含む): 38730240

約数和(自身を除く): 17644245

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 409, 491, 1227, 1473, 2045, 2455, 2863, 3437, 6135, 7365, 8589, 10311, 14315, 17185, 42945, 51555, 200819, 602457, 1004095, 1405733, 3012285, 4217199, 7028665, 21085995]

約数ペア:

[(1, 21085995), (3, 7028665), (5, 4217199), (7, 3012285), (15, 1405733), (21, 1004095), (35, 602457), (105, 200819), (409, 51555), (491, 42945), (1227, 17185), (1473, 14315), (2045, 10311), (2455, 8589), (2863, 7365), (3437, 6135)]