17721665

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{2647}}^1$

素因数の和:2768

約数の個数: 16

約数和(自身を含む): 23132928

約数和(自身を除く): 5411263

約数列:

[1, 5, 13, 65, 103, 515, 1339, 2647, 6695, 13235, 34411, 172055, 272641, 1363205, 3544333, 17721665]

約数ペア:

[(1, 17721665), (5, 3544333), (13, 1363205), (65, 272641), (103, 172055), (515, 34411), (1339, 13235), (2647, 6695)]