21131990

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{10111}}^1$

素因数の和:10148

約数の個数: 32

約数和(自身を含む): 43683840

約数和(自身を除く): 22551850

約数列:

[1, 2, 5, 10, 11, 19, 22, 38, 55, 95, 110, 190, 209, 418, 1045, 2090, 10111, 20222, 50555, 101110, 111221, 192109, 222442, 384218, 556105, 960545, 1112210, 1921090, 2113199, 4226398, 10565995, 21131990]

約数ペア:

[(1, 21131990), (2, 10565995), (5, 4226398), (10, 2113199), (11, 1921090), (19, 1112210), (22, 960545), (38, 556105), (55, 384218), (95, 222442), (110, 192109), (190, 111221), (209, 101110), (418, 50555), (1045, 20222), (2090, 10111)]