28223125

素因数分解:

$5^4\times 7^1\times {\mathrm{6451}}^1$

素因数の和:6478

約数の個数: 20

約数和(自身を含む): 40312096

約数和(自身を除く): 12088971

約数列:

[1, 5, 7, 25, 35, 125, 175, 625, 875, 4375, 6451, 32255, 45157, 161275, 225785, 806375, 1128925, 4031875, 5644625, 28223125]

約数ペア:

[(1, 28223125), (5, 5644625), (7, 4031875), (25, 1128925), (35, 806375), (125, 225785), (175, 161275), (625, 45157), (875, 32255), (4375, 6451)]