18978025

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{69011}}^1$

素因数の和:69032

約数の個数: 12

約数和(自身を含む): 25672464

約数和(自身を除く): 6694439

約数列:

[1, 5, 11, 25, 55, 275, 69011, 345055, 759121, 1725275, 3795605, 18978025]

約数ペア:

[(1, 18978025), (5, 3795605), (11, 1725275), (25, 759121), (55, 345055), (275, 69011)]