19788125

素因数分解:

$5^4\times 7^1\times {\mathrm{4523}}^1$

素因数の和:4550

約数の個数: 20

約数和(自身を含む): 28265952

約数和(自身を除く): 8477827

約数列:

[1, 5, 7, 25, 35, 125, 175, 625, 875, 4375, 4523, 22615, 31661, 113075, 158305, 565375, 791525, 2826875, 3957625, 19788125]

約数ペア:

[(1, 19788125), (5, 3957625), (7, 2826875), (25, 791525), (35, 565375), (125, 158305), (175, 113075), (625, 31661), (875, 22615), (4375, 4523)]