21053548

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{191}}^1\times {\mathrm{1621}}^1$

素因数の和:1833

約数の個数: 24

約数和(自身を含む): 39239424

約数和(自身を除く): 18185876

約数列:

[1, 2, 4, 17, 34, 68, 191, 382, 764, 1621, 3242, 3247, 6484, 6494, 12988, 27557, 55114, 110228, 309611, 619222, 1238444, 5263387, 10526774, 21053548]

約数ペア:

[(1, 21053548), (2, 10526774), (4, 5263387), (17, 1238444), (34, 619222), (68, 309611), (191, 110228), (382, 55114), (764, 27557), (1621, 12988), (3242, 6494), (3247, 6484)]