28131440

素因数分解:

$2^4\times 5^1\times {\mathrm{351643}}^1$

素因数の和:351656

約数の個数: 20

約数和(自身を含む): 65405784

約数和(自身を除く): 37274344

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 351643, 703286, 1406572, 1758215, 2813144, 3516430, 5626288, 7032860, 14065720, 28131440]

約数ペア:

[(1, 28131440), (2, 14065720), (4, 7032860), (5, 5626288), (8, 3516430), (10, 2813144), (16, 1758215), (20, 1406572), (40, 703286), (80, 351643)]