21015806

素因数分解:

$2^1\times 7^2\times {\mathrm{131}}^1\times {\mathrm{1637}}^1$

素因数の和:1784

約数の個数: 24

約数和(自身を含む): 36972936

約数和(自身を除く): 15957130

約数列:

[1, 2, 7, 14, 49, 98, 131, 262, 917, 1637, 1834, 3274, 6419, 11459, 12838, 22918, 80213, 160426, 214447, 428894, 1501129, 3002258, 10507903, 21015806]

約数ペア:

[(1, 21015806), (2, 10507903), (7, 3002258), (14, 1501129), (49, 428894), (98, 214447), (131, 160426), (262, 80213), (917, 22918), (1637, 12838), (1834, 11459), (3274, 6419)]