18109975

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{541}}^1$

素因数の和:667

約数の個数: 24

約数和(自身を含む): 24463712

約数和(自身を除く): 6353737

約数列:

[1, 5, 13, 25, 65, 103, 325, 515, 541, 1339, 2575, 2705, 6695, 7033, 13525, 33475, 35165, 55723, 175825, 278615, 724399, 1393075, 3621995, 18109975]

約数ペア:

[(1, 18109975), (5, 3621995), (13, 1393075), (25, 724399), (65, 278615), (103, 175825), (325, 55723), (515, 35165), (541, 33475), (1339, 13525), (2575, 7033), (2705, 6695)]