21072729

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{127}}^1$

素因数の和:261

約数の個数: 32

約数和(自身を含む): 30965760

約数和(自身を除く): 9893031

約数列:

[1, 3, 19, 41, 57, 71, 123, 127, 213, 381, 779, 1349, 2337, 2413, 2911, 4047, 5207, 7239, 8733, 9017, 15621, 27051, 55309, 98933, 165927, 171323, 296799, 369697, 513969, 1109091, 7024243, 21072729]

約数ペア:

[(1, 21072729), (3, 7024243), (19, 1109091), (41, 513969), (57, 369697), (71, 296799), (123, 171323), (127, 165927), (213, 98933), (381, 55309), (779, 27051), (1349, 15621), (2337, 9017), (2413, 8733), (2911, 7239), (4047, 5207)]