21281029

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{191}}^1\times {\mathrm{1447}}^1$

素因数の和:1656

約数の個数: 16

約数和(自身を含む): 26689536

約数和(自身を除く): 5408507

約数列:

[1, 7, 11, 77, 191, 1337, 1447, 2101, 10129, 14707, 15917, 111419, 276377, 1934639, 3040147, 21281029]

約数ペア:

[(1, 21281029), (7, 3040147), (11, 1934639), (77, 276377), (191, 111419), (1337, 15917), (1447, 14707), (2101, 10129)]