21757527

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{269}}^1$

素因数の和:348

約数の個数: 48

約数和(自身を含む): 37065600

約数和(自身を除く): 15308073

約数列:

[1, 3, 9, 11, 19, 33, 43, 57, 99, 129, 171, 209, 269, 387, 473, 627, 807, 817, 1419, 1881, 2421, 2451, 2959, 4257, 5111, 7353, 8877, 8987, 11567, 15333, 26631, 26961, 34701, 45999, 56221, 80883, 104103, 127237, 168663, 219773, 381711, 505989, 659319, 1145133, 1977957, 2417503, 7252509, 21757527]

約数ペア:

[(1, 21757527), (3, 7252509), (9, 2417503), (11, 1977957), (19, 1145133), (33, 659319), (43, 505989), (57, 381711), (99, 219773), (129, 168663), (171, 127237), (209, 104103), (269, 80883), (387, 56221), (473, 45999), (627, 34701), (807, 26961), (817, 26631), (1419, 15333), (1881, 11567), (2421, 8987), (2451, 8877), (2959, 7353), (4257, 5111)]