21043828

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{499}}^1\times {\mathrm{811}}^1$

素因数の和:1327

約数の個数: 24

約数和(自身を含む): 39788000

約数和(自身を除く): 18744172

約数列:

[1, 2, 4, 13, 26, 52, 499, 811, 998, 1622, 1996, 3244, 6487, 10543, 12974, 21086, 25948, 42172, 404689, 809378, 1618756, 5260957, 10521914, 21043828]

約数ペア:

[(1, 21043828), (2, 10521914), (4, 5260957), (13, 1618756), (26, 809378), (52, 404689), (499, 42172), (811, 25948), (998, 21086), (1622, 12974), (1996, 10543), (3244, 6487)]