18878275

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{2003}}^1$

素因数の和:2055

約数の個数: 24

約数和(自身を含む): 26092080

約数和(自身を除く): 7213805

約数列:

[1, 5, 13, 25, 29, 65, 145, 325, 377, 725, 1885, 2003, 9425, 10015, 26039, 50075, 58087, 130195, 290435, 650975, 755131, 1452175, 3775655, 18878275]

約数ペア:

[(1, 18878275), (5, 3775655), (13, 1452175), (25, 755131), (29, 650975), (65, 290435), (145, 130195), (325, 58087), (377, 50075), (725, 26039), (1885, 10015), (2003, 9425)]