20781828

素因数分解:

$2^2\times 3^2\times {\mathrm{151}}^1\times {\mathrm{3823}}^1$

素因数の和:3984

約数の個数: 36

約数和(自身を含む): 52893568

約数和(自身を除く): 32111740

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 151, 302, 453, 604, 906, 1359, 1812, 2718, 3823, 5436, 7646, 11469, 15292, 22938, 34407, 45876, 68814, 137628, 577273, 1154546, 1731819, 2309092, 3463638, 5195457, 6927276, 10390914, 20781828]

約数ペア:

[(1, 20781828), (2, 10390914), (3, 6927276), (4, 5195457), (6, 3463638), (9, 2309092), (12, 1731819), (18, 1154546), (36, 577273), (151, 137628), (302, 68814), (453, 45876), (604, 34407), (906, 22938), (1359, 15292), (1812, 11469), (2718, 7646), (3823, 5436)]