19988133

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{449}}^1$

素因数の和:553

約数の個数: 32

約数和(自身を含む): 31104000

約数和(自身を除く): 11115867

約数列:

[1, 3, 11, 19, 33, 57, 71, 209, 213, 449, 627, 781, 1347, 1349, 2343, 4047, 4939, 8531, 14817, 14839, 25593, 31879, 44517, 93841, 95637, 281523, 350669, 605701, 1052007, 1817103, 6662711, 19988133]

約数ペア:

[(1, 19988133), (3, 6662711), (11, 1817103), (19, 1052007), (33, 605701), (57, 350669), (71, 281523), (209, 95637), (213, 93841), (449, 44517), (627, 31879), (781, 25593), (1347, 14839), (1349, 14817), (2343, 8531), (4047, 4939)]