20897485

素因数分解:

$5^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{3803}}^1$

素因数の和:3972

約数の個数: 16

約数和(自身を含む): 28849536

約数和(自身を除く): 7952051

約数列:

[1, 5, 7, 35, 157, 785, 1099, 3803, 5495, 19015, 26621, 133105, 597071, 2985355, 4179497, 20897485]

約数ペア:

[(1, 20897485), (5, 4179497), (7, 2985355), (35, 597071), (157, 133105), (785, 26621), (1099, 19015), (3803, 5495)]