27983380

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{89}}^1\times {\mathrm{199}}^1$

素因数の和:376

約数の個数: 48

約数和(自身を含む): 60480000

約数和(自身を除く): 32496620

約数列:

[1, 2, 4, 5, 10, 20, 79, 89, 158, 178, 199, 316, 356, 395, 398, 445, 790, 796, 890, 995, 1580, 1780, 1990, 3980, 7031, 14062, 15721, 17711, 28124, 31442, 35155, 35422, 62884, 70310, 70844, 78605, 88555, 140620, 157210, 177110, 314420, 354220, 1399169, 2798338, 5596676, 6995845, 13991690, 27983380]

約数ペア:

[(1, 27983380), (2, 13991690), (4, 6995845), (5, 5596676), (10, 2798338), (20, 1399169), (79, 354220), (89, 314420), (158, 177110), (178, 157210), (199, 140620), (316, 88555), (356, 78605), (395, 70844), (398, 70310), (445, 62884), (790, 35422), (796, 35155), (890, 31442), (995, 28124), (1580, 17711), (1780, 15721), (1990, 14062), (3980, 7031)]