80878780

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{40039}}^1$

素因数の和:40149

約数の個数: 24

約数和(自身を含む): 171531360

約数和(自身を除く): 90652580

約数列:

[1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010, 2020, 40039, 80078, 160156, 200195, 400390, 800780, 4043939, 8087878, 16175756, 20219695, 40439390, 80878780]

約数ペア:

[(1, 80878780), (2, 40439390), (4, 20219695), (5, 16175756), (10, 8087878), (20, 4043939), (101, 800780), (202, 400390), (404, 200195), (505, 160156), (1010, 80078), (2020, 40039)]