12391561

素因数分解:

$7^4\times {\mathrm{13}}^1\times {\mathrm{397}}^1$

素因数の和:438

約数の個数: 20

約数和(自身を含む): 15607172

約数和(自身を除く): 3215611

約数列:

[1, 7, 13, 49, 91, 343, 397, 637, 2401, 2779, 4459, 5161, 19453, 31213, 36127, 136171, 252889, 953197, 1770223, 12391561]

約数ペア:

[(1, 12391561), (7, 1770223), (13, 953197), (49, 252889), (91, 136171), (343, 36127), (397, 31213), (637, 19453), (2401, 5161), (2779, 4459)]