20989754

素因数分解:

$2^1\times {\mathrm{23}}^1\times {\mathrm{191}}^1\times {\mathrm{2389}}^1$

素因数の和:2605

約数の個数: 16

約数和(自身を含む): 33039360

約数和(自身を除く): 12049606

約数列:

[1, 2, 23, 46, 191, 382, 2389, 4393, 4778, 8786, 54947, 109894, 456299, 912598, 10494877, 20989754]

約数ペア:

[(1, 20989754), (2, 10494877), (23, 912598), (46, 456299), (191, 109894), (382, 54947), (2389, 8786), (4393, 4778)]