28487781

素因数分解:

$3^4\times 7^1\times {\mathrm{47}}^1\times {\mathrm{1069}}^1$

素因数の和:1135

約数の個数: 40

約数和(自身を含む): 49716480

約数和(自身を除く): 21228699

約数列:

[1, 3, 7, 9, 21, 27, 47, 63, 81, 141, 189, 329, 423, 567, 987, 1069, 1269, 2961, 3207, 3807, 7483, 8883, 9621, 22449, 26649, 28863, 50243, 67347, 86589, 150729, 202041, 351701, 452187, 606123, 1055103, 1356561, 3165309, 4069683, 9495927, 28487781]

約数ペア:

[(1, 28487781), (3, 9495927), (7, 4069683), (9, 3165309), (21, 1356561), (27, 1055103), (47, 606123), (63, 452187), (81, 351701), (141, 202041), (189, 150729), (329, 86589), (423, 67347), (567, 50243), (987, 28863), (1069, 26649), (1269, 22449), (2961, 9621), (3207, 8883), (3807, 7483)]