20658617

素因数分解:

$7^1\times {\mathrm{31}}^2\times {\mathrm{37}}^1\times {\mathrm{83}}^1$

素因数の和:189

約数の個数: 24

約数和(自身を含む): 25357248

約数和(自身を除く): 4698631

約数列:

[1, 7, 31, 37, 83, 217, 259, 581, 961, 1147, 2573, 3071, 6727, 8029, 18011, 21497, 35557, 79763, 95201, 248899, 558341, 666407, 2951231, 20658617]

約数ペア:

[(1, 20658617), (7, 2951231), (31, 666407), (37, 558341), (83, 248899), (217, 95201), (259, 79763), (581, 35557), (961, 21497), (1147, 18011), (2573, 8029), (3071, 6727)]