19835440

素因数分解:

$2^4\times 5^1\times {\mathrm{247943}}^1$

素因数の和:247956

約数の個数: 20

約数和(自身を含む): 46117584

約数和(自身を除く): 26282144

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 247943, 495886, 991772, 1239715, 1983544, 2479430, 3967088, 4958860, 9917720, 19835440]

約数ペア:

[(1, 19835440), (2, 9917720), (4, 4958860), (5, 3967088), (8, 2479430), (10, 1983544), (16, 1239715), (20, 991772), (40, 495886), (80, 247943)]