2178152275

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{515539}}^1$

素因数の和:515575

約数の個数: 18

約数和(自身を含む): 2924658420

約数和(自身を除く): 746506145

約数列:

[1, 5, 13, 25, 65, 169, 325, 845, 4225, 515539, 2577695, 6702007, 12888475, 33510035, 87126091, 167550175, 435630455, 2178152275]

約数ペア:

[(1, 2178152275), (5, 435630455), (13, 167550175), (25, 87126091), (65, 33510035), (169, 12888475), (325, 6702007), (845, 2577695), (4225, 515539)]