19902916

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{113}}^1\times {\mathrm{4003}}^1$

素因数の和:4131

約数の個数: 24

約数和(自身を含む): 38342304

約数和(自身を除く): 18439388

約数列:

[1, 2, 4, 11, 22, 44, 113, 226, 452, 1243, 2486, 4003, 4972, 8006, 16012, 44033, 88066, 176132, 452339, 904678, 1809356, 4975729, 9951458, 19902916]

約数ペア:

[(1, 19902916), (2, 9951458), (4, 4975729), (11, 1809356), (22, 904678), (44, 452339), (113, 176132), (226, 88066), (452, 44033), (1243, 16012), (2486, 8006), (4003, 4972)]