21405010

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{194591}}^1$

素因数の和:194609

約数の個数: 16

約数和(自身を含む): 42031872

約数和(自身を除く): 20626862

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 194591, 389182, 972955, 1945910, 2140501, 4281002, 10702505, 21405010]

約数ペア:

[(1, 21405010), (2, 10702505), (5, 4281002), (10, 2140501), (11, 1945910), (22, 972955), (55, 389182), (110, 194591)]