28815381

素因数分解:

$3^2\times 7^2\times {\mathrm{19}}^2\times {\mathrm{181}}^1$

素因数の和:239

約数の個数: 54

約数和(自身を含む): 51382422

約数和(自身を除く): 22567041

約数列:

[1, 3, 7, 9, 19, 21, 49, 57, 63, 133, 147, 171, 181, 361, 399, 441, 543, 931, 1083, 1197, 1267, 1629, 2527, 2793, 3249, 3439, 3801, 7581, 8379, 8869, 10317, 11403, 17689, 22743, 24073, 26607, 30951, 53067, 65341, 72219, 79821, 159201, 168511, 196023, 216657, 457387, 505533, 588069, 1372161, 1516599, 3201709, 4116483, 9605127, 28815381]

約数ペア:

[(1, 28815381), (3, 9605127), (7, 4116483), (9, 3201709), (19, 1516599), (21, 1372161), (49, 588069), (57, 505533), (63, 457387), (133, 216657), (147, 196023), (171, 168511), (181, 159201), (361, 79821), (399, 72219), (441, 65341), (543, 53067), (931, 30951), (1083, 26607), (1197, 24073), (1267, 22743), (1629, 17689), (2527, 11403), (2793, 10317), (3249, 8869), (3439, 8379), (3801, 7581)]