81209905

素因数分解:

$5^1\times 7^2\times {\mathrm{109}}^1\times {\mathrm{3041}}^1$

素因数の和:3169

約数の個数: 24

約数和(自身を含む): 114440040

約数和(自身を除く): 33230135

約数列:

[1, 5, 7, 35, 49, 109, 245, 545, 763, 3041, 3815, 5341, 15205, 21287, 26705, 106435, 149009, 331469, 745045, 1657345, 2320283, 11601415, 16241981, 81209905]

約数ペア:

[(1, 81209905), (5, 16241981), (7, 11601415), (35, 2320283), (49, 1657345), (109, 745045), (245, 331469), (545, 149009), (763, 106435), (3041, 26705), (3815, 21287), (5341, 15205)]