198913640

素因数分解:

$2^3\times 5^1\times {\mathrm{4972841}}^1$

素因数の和:4972852

約数の個数: 16

約数和(自身を含む): 447555780

約数和(自身を除く): 248642140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 4972841, 9945682, 19891364, 24864205, 39782728, 49728410, 99456820, 198913640]

約数ペア:

[(1, 198913640), (2, 99456820), (4, 49728410), (5, 39782728), (8, 24864205), (10, 19891364), (20, 9945682), (40, 4972841)]