28289840

素因数分解:

$2^4\times 5^1\times {\mathrm{199}}^1\times {\mathrm{1777}}^1$

素因数の和:1989

約数の個数: 40

約数和(自身を含む): 66141600

約数和(自身を除く): 37851760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 199, 398, 796, 995, 1592, 1777, 1990, 3184, 3554, 3980, 7108, 7960, 8885, 14216, 15920, 17770, 28432, 35540, 71080, 142160, 353623, 707246, 1414492, 1768115, 2828984, 3536230, 5657968, 7072460, 14144920, 28289840]

約数ペア:

[(1, 28289840), (2, 14144920), (4, 7072460), (5, 5657968), (8, 3536230), (10, 2828984), (16, 1768115), (20, 1414492), (40, 707246), (80, 353623), (199, 142160), (398, 71080), (796, 35540), (995, 28432), (1592, 17770), (1777, 15920), (1990, 14216), (3184, 8885), (3554, 7960), (3980, 7108)]