20686505

素因数分解:

$5^1\times 7^1\times {\mathrm{83}}^1\times {\mathrm{7121}}^1$

素因数の和:7216

約数の個数: 16

約数和(自身を含む): 28715904

約数和(自身を除く): 8029399

約数列:

[1, 5, 7, 35, 83, 415, 581, 2905, 7121, 35605, 49847, 249235, 591043, 2955215, 4137301, 20686505]

約数ペア:

[(1, 20686505), (5, 4137301), (7, 2955215), (35, 591043), (83, 249235), (415, 49847), (581, 35605), (2905, 7121)]