21609140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{154351}}^1$

素因数の和:154367

約数の個数: 24

約数和(自身を含む): 51862272

約数和(自身を除く): 30253132

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 154351, 308702, 617404, 771755, 1080457, 1543510, 2160914, 3087020, 4321828, 5402285, 10804570, 21609140]

約数ペア:

[(1, 21609140), (2, 10804570), (4, 5402285), (5, 4321828), (7, 3087020), (10, 2160914), (14, 1543510), (20, 1080457), (28, 771755), (35, 617404), (70, 308702), (140, 154351)]