19894640

素因数分解:

$2^4\times 5^1\times {\mathrm{248683}}^1$

素因数の和:248696

約数の個数: 20

約数和(自身を含む): 46255224

約数和(自身を除く): 26360584

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 248683, 497366, 994732, 1243415, 1989464, 2486830, 3978928, 4973660, 9947320, 19894640]

約数ペア:

[(1, 19894640), (2, 9947320), (4, 4973660), (5, 3978928), (8, 2486830), (10, 1989464), (16, 1243415), (20, 994732), (40, 497366), (80, 248683)]