19996505

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{5471}}^1$

素因数の和:5536

約数の個数: 16

約数和(自身を含む): 26002944

約数和(自身を除く): 6006439

約数列:

[1, 5, 17, 43, 85, 215, 731, 3655, 5471, 27355, 93007, 235253, 465035, 1176265, 3999301, 19996505]

約数ペア:

[(1, 19996505), (5, 3999301), (17, 1176265), (43, 465035), (85, 235253), (215, 93007), (731, 27355), (3655, 5471)]