19910172.000000000

素因数分解:

$2^3\times 5^1\times {\mathrm{3278381}}^1$

素因数の和:3278392

約数の個数: 16

約数和(自身を含む): 295054380

約数和(自身を除く): 163919140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 3278381, 6556762, 13113524, 16391905, 26227048, 32783810, 65567620, 131135240]

約数ペア:

[(1, 131135240), (2, 65567620), (4, 32783810), (5, 26227048), (8, 16391905), (10, 13113524), (20, 6556762), (40, 3278381)]