19661680

素因数分解:

$2^4\times 5^1\times {\mathrm{245771}}^1$

素因数の和:245784

約数の個数: 20

約数和(自身を含む): 45713592

約数和(自身を除く): 26051912

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 245771, 491542, 983084, 1228855, 1966168, 2457710, 3932336, 4915420, 9830840, 19661680]

約数ペア:

[(1, 19661680), (2, 9830840), (4, 4915420), (5, 3932336), (8, 2457710), (10, 1966168), (16, 1228855), (20, 983084), (40, 491542), (80, 245771)]