19982840

素因数分解:

$2^3\times 5^1\times {\mathrm{499571}}^1$

素因数の和:499582

約数の個数: 16

約数和(自身を含む): 44961480

約数和(自身を除く): 24978640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 499571, 999142, 1998284, 2497855, 3996568, 4995710, 9991420, 19982840]

約数ペア:

[(1, 19982840), (2, 9991420), (4, 4995710), (5, 3996568), (8, 2497855), (10, 1998284), (20, 999142), (40, 499571)]