21979612

素因数分解:

$2^2\times {\mathrm{71}}^1\times {\mathrm{193}}^1\times {\mathrm{401}}^1$

素因数の和:669

約数の個数: 24

約数和(自身を含む): 39305952

約数和(自身を除く): 17326340

約数列:

[1, 2, 4, 71, 142, 193, 284, 386, 401, 772, 802, 1604, 13703, 27406, 28471, 54812, 56942, 77393, 113884, 154786, 309572, 5494903, 10989806, 21979612]

約数ペア:

[(1, 21979612), (2, 10989806), (4, 5494903), (71, 309572), (142, 154786), (193, 113884), (284, 77393), (386, 56942), (401, 54812), (772, 28471), (802, 27406), (1604, 13703)]