20980828

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{7817}}^1$

素因数の和:7893

約数の個数: 24

約数和(自身を含む): 40716144

約数和(自身を除く): 19735316

約数列:

[1, 2, 4, 11, 22, 44, 61, 122, 244, 671, 1342, 2684, 7817, 15634, 31268, 85987, 171974, 343948, 476837, 953674, 1907348, 5245207, 10490414, 20980828]

約数ペア:

[(1, 20980828), (2, 10490414), (4, 5245207), (11, 1907348), (22, 953674), (44, 476837), (61, 343948), (122, 171974), (244, 85987), (671, 31268), (1342, 15634), (2684, 7817)]