28069821

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1$

素因数の和:128

約数の個数: 80

約数和(自身を含む): 50413440

約数和(自身を除く): 22343619

約数列:

[1, 3, 9, 13, 19, 23, 27, 39, 57, 61, 69, 81, 117, 171, 183, 207, 247, 299, 351, 437, 513, 549, 621, 741, 793, 897, 1053, 1159, 1311, 1403, 1539, 1647, 1863, 2223, 2379, 2691, 3477, 3933, 4209, 4941, 5681, 6669, 7137, 8073, 10431, 11799, 12627, 15067, 17043, 18239, 20007, 21411, 24219, 26657, 31293, 35397, 37881, 45201, 51129, 54717, 64233, 79971, 93879, 113643, 135603, 153387, 164151, 239913, 346541, 406809, 460161, 492453, 719739, 1039623, 1220427, 1477359, 2159217, 3118869, 9356607, 28069821]

約数ペア:

[(1, 28069821), (3, 9356607), (9, 3118869), (13, 2159217), (19, 1477359), (23, 1220427), (27, 1039623), (39, 719739), (57, 492453), (61, 460161), (69, 406809), (81, 346541), (117, 239913), (171, 164151), (183, 153387), (207, 135603), (247, 113643), (299, 93879), (351, 79971), (437, 64233), (513, 54717), (549, 51129), (621, 45201), (741, 37881), (793, 35397), (897, 31293), (1053, 26657), (1159, 24219), (1311, 21411), (1403, 20007), (1539, 18239), (1647, 17043), (1863, 15067), (2223, 12627), (2379, 11799), (2691, 10431), (3477, 8073), (3933, 7137), (4209, 6669), (4941, 5681)]