21507604

素因数分解:

$2^2\times {\mathrm{71}}^1\times {\mathrm{75731}}^1$

素因数の和:75806

約数の個数: 12

約数和(自身を含む): 38168928

約数和(自身を除く): 16661324

約数列:

[1, 2, 4, 71, 142, 284, 75731, 151462, 302924, 5376901, 10753802, 21507604]

約数ペア:

[(1, 21507604), (2, 10753802), (4, 5376901), (71, 302924), (142, 151462), (284, 75731)]