28377783

素因数分解:

$3^6\times 7^1\times {\mathrm{67}}^1\times {\mathrm{83}}^1$

素因数の和:175

約数の個数: 56

約数和(自身を含む): 49945728

約数和(自身を除く): 21567945

約数列:

[1, 3, 7, 9, 21, 27, 63, 67, 81, 83, 189, 201, 243, 249, 469, 567, 581, 603, 729, 747, 1407, 1701, 1743, 1809, 2241, 4221, 5103, 5229, 5427, 5561, 6723, 12663, 15687, 16281, 16683, 20169, 37989, 38927, 47061, 48843, 50049, 60507, 113967, 116781, 141183, 150147, 341901, 350343, 423549, 450441, 1051029, 1351323, 3153087, 4053969, 9459261, 28377783]

約数ペア:

[(1, 28377783), (3, 9459261), (7, 4053969), (9, 3153087), (21, 1351323), (27, 1051029), (63, 450441), (67, 423549), (81, 350343), (83, 341901), (189, 150147), (201, 141183), (243, 116781), (249, 113967), (469, 60507), (567, 50049), (581, 48843), (603, 47061), (729, 38927), (747, 37989), (1407, 20169), (1701, 16683), (1743, 16281), (1809, 15687), (2241, 12663), (4221, 6723), (5103, 5561), (5229, 5427)]