398901125

素因数分解:

$5^3\times 7^1\times {\mathrm{643}}^1\times {\mathrm{709}}^1$

素因数の和:1374

約数の個数: 32

約数和(自身を含む): 570635520

約数和(自身を除く): 171734395

約数列:

[1, 5, 7, 25, 35, 125, 175, 643, 709, 875, 3215, 3545, 4501, 4963, 16075, 17725, 22505, 24815, 80375, 88625, 112525, 124075, 455887, 562625, 620375, 2279435, 3191209, 11397175, 15956045, 56985875, 79780225, 398901125]

約数ペア:

[(1, 398901125), (5, 79780225), (7, 56985875), (25, 15956045), (35, 11397175), (125, 3191209), (175, 2279435), (643, 620375), (709, 562625), (875, 455887), (3215, 124075), (3545, 112525), (4501, 88625), (4963, 80375), (16075, 24815), (17725, 22505)]