19859905

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{3433}}^1$

素因数の和:3540

約数の個数: 16

約数和(自身を含む): 25961040

約数和(自身を除く): 6101135

約数列:

[1, 5, 13, 65, 89, 445, 1157, 3433, 5785, 17165, 44629, 223145, 305537, 1527685, 3971981, 19859905]

約数ペア:

[(1, 19859905), (5, 3971981), (13, 1527685), (65, 305537), (89, 223145), (445, 44629), (1157, 17165), (3433, 5785)]