28261779

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{643}}^1$

素因数の和:696

約数の個数: 48

約数和(自身を含む): 49335552

約数和(自身を除く): 21073773

約数列:

[1, 3, 7, 13, 21, 23, 39, 49, 69, 91, 147, 161, 273, 299, 483, 637, 643, 897, 1127, 1911, 1929, 2093, 3381, 4501, 6279, 8359, 13503, 14651, 14789, 25077, 31507, 43953, 44367, 58513, 94521, 103523, 175539, 192257, 310569, 409591, 576771, 724661, 1228773, 1345799, 2173983, 4037397, 9420593, 28261779]

約数ペア:

[(1, 28261779), (3, 9420593), (7, 4037397), (13, 2173983), (21, 1345799), (23, 1228773), (39, 724661), (49, 576771), (69, 409591), (91, 310569), (147, 192257), (161, 175539), (273, 103523), (299, 94521), (483, 58513), (637, 44367), (643, 43953), (897, 31507), (1127, 25077), (1911, 14789), (1929, 14651), (2093, 13503), (3381, 8359), (4501, 6279)]