80977520

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{77863}}^1$

素因数の和:77889

約数の個数: 40

約数和(自身を含む): 202757856

約数和(自身を除く): 121780336

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 77863, 155726, 311452, 389315, 622904, 778630, 1012219, 1245808, 1557260, 2024438, 3114520, 4048876, 5061095, 6229040, 8097752, 10122190, 16195504, 20244380, 40488760, 80977520]

約数ペア:

[(1, 80977520), (2, 40488760), (4, 20244380), (5, 16195504), (8, 10122190), (10, 8097752), (13, 6229040), (16, 5061095), (20, 4048876), (26, 3114520), (40, 2024438), (52, 1557260), (65, 1245808), (80, 1012219), (104, 778630), (130, 622904), (208, 389315), (260, 311452), (520, 155726), (1040, 77863)]