20278780

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{10039}}^1$

素因数の和:10149

約数の個数: 24

約数和(自身を含む): 43011360

約数和(自身を除く): 22732580

約数列:

[1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010, 2020, 10039, 20078, 40156, 50195, 100390, 200780, 1013939, 2027878, 4055756, 5069695, 10139390, 20278780]

約数ペア:

[(1, 20278780), (2, 10139390), (4, 5069695), (5, 4055756), (10, 2027878), (20, 1013939), (101, 200780), (202, 100390), (404, 50195), (505, 40156), (1010, 20078), (2020, 10039)]