81260120

素因数分解:

$2^3\times 5^1\times {\mathrm{409}}^1\times {\mathrm{4967}}^1$

素因数の和:5387

約数の個数: 32

約数和(自身を含む): 183319200

約数和(自身を除く): 102059080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 409, 818, 1636, 2045, 3272, 4090, 4967, 8180, 9934, 16360, 19868, 24835, 39736, 49670, 99340, 198680, 2031503, 4063006, 8126012, 10157515, 16252024, 20315030, 40630060, 81260120]

約数ペア:

[(1, 81260120), (2, 40630060), (4, 20315030), (5, 16252024), (8, 10157515), (10, 8126012), (20, 4063006), (40, 2031503), (409, 198680), (818, 99340), (1636, 49670), (2045, 39736), (3272, 24835), (4090, 19868), (4967, 16360), (8180, 9934)]