28678280

素因数分解:

$2^3\times 5^1\times {\mathrm{787}}^1\times {\mathrm{911}}^1$

素因数の和:1709

約数の個数: 32

約数和(自身を含む): 64679040

約数和(自身を除く): 36000760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 787, 911, 1574, 1822, 3148, 3644, 3935, 4555, 6296, 7288, 7870, 9110, 15740, 18220, 31480, 36440, 716957, 1433914, 2867828, 3584785, 5735656, 7169570, 14339140, 28678280]

約数ペア:

[(1, 28678280), (2, 14339140), (4, 7169570), (5, 5735656), (8, 3584785), (10, 2867828), (20, 1433914), (40, 716957), (787, 36440), (911, 31480), (1574, 18220), (1822, 15740), (3148, 9110), (3644, 7870), (3935, 7288), (4555, 6296)]