21367521

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{281}}^1$

素因数の和:382

約数の個数: 48

約数和(自身を含む): 38009088

約数和(自身を除く): 16641567

約数列:

[1, 3, 7, 9, 17, 21, 51, 63, 71, 119, 153, 213, 281, 357, 497, 639, 843, 1071, 1207, 1491, 1967, 2529, 3621, 4473, 4777, 5901, 8449, 10863, 14331, 17703, 19951, 25347, 33439, 42993, 59853, 76041, 100317, 139657, 179559, 300951, 339167, 418971, 1017501, 1256913, 2374169, 3052503, 7122507, 21367521]

約数ペア:

[(1, 21367521), (3, 7122507), (7, 3052503), (9, 2374169), (17, 1256913), (21, 1017501), (51, 418971), (63, 339167), (71, 300951), (119, 179559), (153, 139657), (213, 100317), (281, 76041), (357, 59853), (497, 42993), (639, 33439), (843, 25347), (1071, 19951), (1207, 17703), (1491, 14331), (1967, 10863), (2529, 8449), (3621, 5901), (4473, 4777)]