21757813

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{1091}}^1$

素因数の和:1153

約数の個数: 24

約数和(自身を含む): 28383264

約数和(自身を除く): 6625451

約数列:

[1, 7, 11, 37, 49, 77, 259, 407, 539, 1091, 1813, 2849, 7637, 12001, 19943, 40367, 53459, 84007, 282569, 444037, 588049, 1977983, 3108259, 21757813]

約数ペア:

[(1, 21757813), (7, 3108259), (11, 1977983), (37, 588049), (49, 444037), (77, 282569), (259, 84007), (407, 53459), (539, 40367), (1091, 19943), (1813, 12001), (2849, 7637)]