16980275

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{4019}}^1$

素因数の和:4055

約数の個数: 18

約数和(自身を含む): 22805460

約数和(自身を除く): 5825185

約数列:

[1, 5, 13, 25, 65, 169, 325, 845, 4019, 4225, 20095, 52247, 100475, 261235, 679211, 1306175, 3396055, 16980275]

約数ペア:

[(1, 16980275), (5, 3396055), (13, 1306175), (25, 679211), (65, 261235), (169, 100475), (325, 52247), (845, 20095), (4019, 4225)]