21757508

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{353}}^1\times {\mathrm{811}}^1$

素因数の和:1187

約数の個数: 24

約数和(自身を含む): 40242720

約数和(自身を除く): 18485212

約数列:

[1, 2, 4, 19, 38, 76, 353, 706, 811, 1412, 1622, 3244, 6707, 13414, 15409, 26828, 30818, 61636, 286283, 572566, 1145132, 5439377, 10878754, 21757508]

約数ペア:

[(1, 21757508), (2, 10878754), (4, 5439377), (19, 1145132), (38, 572566), (76, 286283), (353, 61636), (706, 30818), (811, 26828), (1412, 15409), (1622, 13414), (3244, 6707)]