9991891

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{5779}}^1$

素因数の和:5818

約数の個数: 16

約数和(自身を含む): 12947200

約数和(自身を除く): 2955309

約数列:

[1, 7, 13, 19, 91, 133, 247, 1729, 5779, 40453, 75127, 109801, 525889, 768607, 1427413, 9991891]

約数ペア:

[(1, 9991891), (7, 1427413), (13, 768607), (19, 525889), (91, 109801), (133, 75127), (247, 40453), (1729, 5779)]