18991024

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{91303}}^1$

素因数の和:91324

約数の個数: 20

約数和(自身を含む): 39625936

約数和(自身を除く): 20634912

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 91303, 182606, 365212, 730424, 1186939, 1460848, 2373878, 4747756, 9495512, 18991024]

約数ペア:

[(1, 18991024), (2, 9495512), (4, 4747756), (8, 2373878), (13, 1460848), (16, 1186939), (26, 730424), (52, 365212), (104, 182606), (208, 91303)]