21389340

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{401}}^1$

素因数の和:547

約数の個数: 96

約数和(自身を含む): 69156864

約数和(自身を除く): 47767524

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 127, 140, 210, 254, 381, 401, 420, 508, 635, 762, 802, 889, 1203, 1270, 1524, 1604, 1778, 1905, 2005, 2406, 2540, 2667, 2807, 3556, 3810, 4010, 4445, 4812, 5334, 5614, 6015, 7620, 8020, 8421, 8890, 10668, 11228, 12030, 13335, 14035, 16842, 17780, 24060, 26670, 28070, 33684, 42105, 50927, 53340, 56140, 84210, 101854, 152781, 168420, 203708, 254635, 305562, 356489, 509270, 611124, 712978, 763905, 1018540, 1069467, 1425956, 1527810, 1782445, 2138934, 3055620, 3564890, 4277868, 5347335, 7129780, 10694670, 21389340]

約数ペア:

[(1, 21389340), (2, 10694670), (3, 7129780), (4, 5347335), (5, 4277868), (6, 3564890), (7, 3055620), (10, 2138934), (12, 1782445), (14, 1527810), (15, 1425956), (20, 1069467), (21, 1018540), (28, 763905), (30, 712978), (35, 611124), (42, 509270), (60, 356489), (70, 305562), (84, 254635), (105, 203708), (127, 168420), (140, 152781), (210, 101854), (254, 84210), (381, 56140), (401, 53340), (420, 50927), (508, 42105), (635, 33684), (762, 28070), (802, 26670), (889, 24060), (1203, 17780), (1270, 16842), (1524, 14035), (1604, 13335), (1778, 12030), (1905, 11228), (2005, 10668), (2406, 8890), (2540, 8421), (2667, 8020), (2807, 7620), (3556, 6015), (3810, 5614), (4010, 5334), (4445, 4812)]