19757680

素因数分解:

$2^4\times 5^1\times {\mathrm{246971}}^1$

素因数の和:246984

約数の個数: 20

約数和(自身を含む): 45936792

約数和(自身を除く): 26179112

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 246971, 493942, 987884, 1234855, 1975768, 2469710, 3951536, 4939420, 9878840, 19757680]

約数ペア:

[(1, 19757680), (2, 9878840), (4, 4939420), (5, 3951536), (8, 2469710), (10, 1975768), (16, 1234855), (20, 987884), (40, 493942), (80, 246971)]