21891363

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{953}}^1$

素因数の和:1019

約数の個数: 32

約数和(自身を含む): 34191360

約数和(自身を除く): 12299997

約数列:

[1, 3, 13, 19, 31, 39, 57, 93, 247, 403, 589, 741, 953, 1209, 1767, 2859, 7657, 12389, 18107, 22971, 29543, 37167, 54321, 88629, 235391, 384059, 561317, 706173, 1152177, 1683951, 7297121, 21891363]

約数ペア:

[(1, 21891363), (3, 7297121), (13, 1683951), (19, 1152177), (31, 706173), (39, 561317), (57, 384059), (93, 235391), (247, 88629), (403, 54321), (589, 37167), (741, 29543), (953, 22971), (1209, 18107), (1767, 12389), (2859, 7657)]