21485961

素因数分解:

$3^2\times 7^2\times {\mathrm{83}}^1\times {\mathrm{587}}^1$

素因数の和:690

約数の個数: 36

約数和(自身を含む): 36599472

約数和(自身を除く): 15113511

約数列:

[1, 3, 7, 9, 21, 49, 63, 83, 147, 249, 441, 581, 587, 747, 1743, 1761, 4067, 4109, 5229, 5283, 12201, 12327, 28763, 36603, 36981, 48721, 86289, 146163, 258867, 341047, 438489, 1023141, 2387329, 3069423, 7161987, 21485961]

約数ペア:

[(1, 21485961), (3, 7161987), (7, 3069423), (9, 2387329), (21, 1023141), (49, 438489), (63, 341047), (83, 258867), (147, 146163), (249, 86289), (441, 48721), (581, 36981), (587, 36603), (747, 28763), (1743, 12327), (1761, 12201), (4067, 5283), (4109, 5229)]