19784375

素因数分解:

$5^5\times {\mathrm{13}}^1\times {\mathrm{487}}^1$

素因数の和:525

約数の個数: 24

約数和(自身を含む): 26685792

約数和(自身を除く): 6901417

約数列:

[1, 5, 13, 25, 65, 125, 325, 487, 625, 1625, 2435, 3125, 6331, 8125, 12175, 31655, 40625, 60875, 158275, 304375, 791375, 1521875, 3956875, 19784375]

約数ペア:

[(1, 19784375), (5, 3956875), (13, 1521875), (25, 791375), (65, 304375), (125, 158275), (325, 60875), (487, 40625), (625, 31655), (1625, 12175), (2435, 8125), (3125, 6331)]