21039963

素因数分解:

$3^1\times 7^4\times {\mathrm{23}}^1\times {\mathrm{127}}^1$

素因数の和:181

約数の個数: 40

約数和(自身を含む): 34418688

約数和(自身を除く): 13378725

約数列:

[1, 3, 7, 21, 23, 49, 69, 127, 147, 161, 343, 381, 483, 889, 1029, 1127, 2401, 2667, 2921, 3381, 6223, 7203, 7889, 8763, 18669, 20447, 23667, 43561, 55223, 61341, 130683, 143129, 165669, 304927, 429387, 914781, 1001903, 3005709, 7013321, 21039963]

約数ペア:

[(1, 21039963), (3, 7013321), (7, 3005709), (21, 1001903), (23, 914781), (49, 429387), (69, 304927), (127, 165669), (147, 143129), (161, 130683), (343, 61341), (381, 55223), (483, 43561), (889, 23667), (1029, 20447), (1127, 18669), (2401, 8763), (2667, 7889), (2921, 7203), (3381, 6223)]