21248997

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{773}}^1$

素因数の和:818

約数の個数: 48

約数和(自身を含む): 38117952

約数和(自身を除く): 16868955

約数列:

[1, 3, 7, 11, 17, 21, 33, 49, 51, 77, 119, 147, 187, 231, 357, 539, 561, 773, 833, 1309, 1617, 2319, 2499, 3927, 5411, 8503, 9163, 13141, 16233, 25509, 27489, 37877, 39423, 59521, 91987, 113631, 144551, 178563, 275961, 416647, 433653, 643909, 1011857, 1249941, 1931727, 3035571, 7082999, 21248997]

約数ペア:

[(1, 21248997), (3, 7082999), (7, 3035571), (11, 1931727), (17, 1249941), (21, 1011857), (33, 643909), (49, 433653), (51, 416647), (77, 275961), (119, 178563), (147, 144551), (187, 113631), (231, 91987), (357, 59521), (539, 39423), (561, 37877), (773, 27489), (833, 25509), (1309, 16233), (1617, 13141), (2319, 9163), (2499, 8503), (3927, 5411)]