21689811

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{887}}^1$

素因数の和:936

約数の個数: 48

約数和(自身を含む): 38787840

約数和(自身を除く): 17098029

約数列:

[1, 3, 9, 11, 13, 19, 33, 39, 57, 99, 117, 143, 171, 209, 247, 429, 627, 741, 887, 1287, 1881, 2223, 2661, 2717, 7983, 8151, 9757, 11531, 16853, 24453, 29271, 34593, 50559, 87813, 103779, 126841, 151677, 185383, 219089, 380523, 556149, 657267, 1141569, 1668447, 1971801, 2409979, 7229937, 21689811]

約数ペア:

[(1, 21689811), (3, 7229937), (9, 2409979), (11, 1971801), (13, 1668447), (19, 1141569), (33, 657267), (39, 556149), (57, 380523), (99, 219089), (117, 185383), (143, 151677), (171, 126841), (209, 103779), (247, 87813), (429, 50559), (627, 34593), (741, 29271), (887, 24453), (1287, 16853), (1881, 11531), (2223, 9757), (2661, 8151), (2717, 7983)]