19894375

素因数分解:

$5^4\times {\mathrm{139}}^1\times {\mathrm{229}}^1$

素因数の和:388

約数の個数: 20

約数和(自身を含む): 25148200

約数和(自身を除く): 5253825

約数列:

[1, 5, 25, 125, 139, 229, 625, 695, 1145, 3475, 5725, 17375, 28625, 31831, 86875, 143125, 159155, 795775, 3978875, 19894375]

約数ペア:

[(1, 19894375), (5, 3978875), (25, 795775), (125, 159155), (139, 143125), (229, 86875), (625, 31831), (695, 28625), (1145, 17375), (3475, 5725)]