99998680

素因数分解:

$2^3\times 5^1\times {\mathrm{2499967}}^1$

素因数の和:2499978

約数の個数: 16

約数和(自身を含む): 224997120

約数和(自身を除く): 124998440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2499967, 4999934, 9999868, 12499835, 19999736, 24999670, 49999340, 99998680]

約数ペア:

[(1, 99998680), (2, 49999340), (4, 24999670), (5, 19999736), (8, 12499835), (10, 9999868), (20, 4999934), (40, 2499967)]