28250019

素因数分解:

$3^3\times 7^2\times {\mathrm{131}}^1\times {\mathrm{163}}^1$

素因数の和:317

約数の個数: 48

約数和(自身を含む): 49357440

約数和(自身を除く): 21107421

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 131, 147, 163, 189, 393, 441, 489, 917, 1141, 1179, 1323, 1467, 2751, 3423, 3537, 4401, 6419, 7987, 8253, 10269, 19257, 21353, 23961, 24759, 30807, 57771, 64059, 71883, 149471, 173313, 192177, 215649, 448413, 576531, 1046297, 1345239, 3138891, 4035717, 9416673, 28250019]

約数ペア:

[(1, 28250019), (3, 9416673), (7, 4035717), (9, 3138891), (21, 1345239), (27, 1046297), (49, 576531), (63, 448413), (131, 215649), (147, 192177), (163, 173313), (189, 149471), (393, 71883), (441, 64059), (489, 57771), (917, 30807), (1141, 24759), (1179, 23961), (1323, 21353), (1467, 19257), (2751, 10269), (3423, 8253), (3537, 7987), (4401, 6419)]