20961339

素因数分解:

$3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{139}}^1\times {\mathrm{167}}^1$

素因数の和:359

約数の個数: 32

約数和(自身を含む): 33116160

約数和(自身を除く): 12154821

約数列:

[1, 3, 7, 21, 43, 129, 139, 167, 301, 417, 501, 903, 973, 1169, 2919, 3507, 5977, 7181, 17931, 21543, 23213, 41839, 50267, 69639, 125517, 150801, 162491, 487473, 998159, 2994477, 6987113, 20961339]

約数ペア:

[(1, 20961339), (3, 6987113), (7, 2994477), (21, 998159), (43, 487473), (129, 162491), (139, 150801), (167, 125517), (301, 69639), (417, 50267), (501, 41839), (903, 23213), (973, 21543), (1169, 17931), (2919, 7181), (3507, 5977)]