8972980

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^2\times {\mathrm{89}}^1$

素因数の和:240

約数の個数: 36

約数和(自身を含む): 19327140

約数和(自身を除く): 10354160

約数列:

[1, 2, 4, 5, 10, 20, 71, 89, 142, 178, 284, 355, 356, 445, 710, 890, 1420, 1780, 5041, 6319, 10082, 12638, 20164, 25205, 25276, 31595, 50410, 63190, 100820, 126380, 448649, 897298, 1794596, 2243245, 4486490, 8972980]

約数ペア:

[(1, 8972980), (2, 4486490), (4, 2243245), (5, 1794596), (10, 897298), (20, 448649), (71, 126380), (89, 100820), (142, 63190), (178, 50410), (284, 31595), (355, 25276), (356, 25205), (445, 20164), (710, 12638), (890, 10082), (1420, 6319), (1780, 5041)]