28137879

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{2137}}^1$

素因数の和:2180

約数の個数: 48

約数和(自身を含む): 53364480

約数和(自身を除く): 25226601

約数列:

[1, 3, 7, 9, 11, 19, 21, 33, 57, 63, 77, 99, 133, 171, 209, 231, 399, 627, 693, 1197, 1463, 1881, 2137, 4389, 6411, 13167, 14959, 19233, 23507, 40603, 44877, 70521, 121809, 134631, 164549, 211563, 284221, 365427, 446633, 493647, 852663, 1339899, 1480941, 2557989, 3126431, 4019697, 9379293, 28137879]

約数ペア:

[(1, 28137879), (3, 9379293), (7, 4019697), (9, 3126431), (11, 2557989), (19, 1480941), (21, 1339899), (33, 852663), (57, 493647), (63, 446633), (77, 365427), (99, 284221), (133, 211563), (171, 164549), (209, 134631), (231, 121809), (399, 70521), (627, 44877), (693, 40603), (1197, 23507), (1463, 19233), (1881, 14959), (2137, 13167), (4389, 6411)]