21311972

素因数分解:

$2^2\times {\mathrm{11}}^3\times {\mathrm{4003}}^1$

素因数の和:4040

約数の個数: 24

約数和(自身を含む): 41032992

約数和(自身を除く): 19721020

約数列:

[1, 2, 4, 11, 22, 44, 121, 242, 484, 1331, 2662, 4003, 5324, 8006, 16012, 44033, 88066, 176132, 484363, 968726, 1937452, 5327993, 10655986, 21311972]

約数ペア:

[(1, 21311972), (2, 10655986), (4, 5327993), (11, 1937452), (22, 968726), (44, 484363), (121, 176132), (242, 88066), (484, 44033), (1331, 16012), (2662, 8006), (4003, 5324)]