261858565

素因数分解:

$5^1\times {\mathrm{17}}^2\times {\mathrm{23}}^1\times {\mathrm{7879}}^1$

素因数の和:7941

約数の個数: 24

約数和(自身を含む): 348359040

約数和(自身を除く): 86500475

約数列:

[1, 5, 17, 23, 85, 115, 289, 391, 1445, 1955, 6647, 7879, 33235, 39395, 133943, 181217, 669715, 906085, 2277031, 3080689, 11385155, 15403445, 52371713, 261858565]

約数ペア:

[(1, 261858565), (5, 52371713), (17, 15403445), (23, 11385155), (85, 3080689), (115, 2277031), (289, 906085), (391, 669715), (1445, 181217), (1955, 133943), (6647, 39395), (7879, 33235)]