66999905

素因数分解:

$5^1\times 7^4\times {\mathrm{5581}}^1$

素因数の和:5614

約数の個数: 20

約数和(自身を含む): 93811092

約数和(自身を除く): 26811187

約数列:

[1, 5, 7, 35, 49, 245, 343, 1715, 2401, 5581, 12005, 27905, 39067, 195335, 273469, 1367345, 1914283, 9571415, 13399981, 66999905]

約数ペア:

[(1, 66999905), (5, 13399981), (7, 9571415), (35, 1914283), (49, 1367345), (245, 273469), (343, 195335), (1715, 39067), (2401, 27905), (5581, 12005)]