128216781

素因数分解:

$3^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{26431}}^1$

素因数の和:26462

約数の個数: 36

約数和(自身を含む): 235033344

約数和(自身を除く): 106816563

約数列:

[1, 3, 7, 9, 11, 21, 33, 49, 63, 77, 99, 147, 231, 441, 539, 693, 1617, 4851, 26431, 79293, 185017, 237879, 290741, 555051, 872223, 1295119, 1665153, 2035187, 2616669, 3885357, 6105561, 11656071, 14246309, 18316683, 42738927, 128216781]

約数ペア:

[(1, 128216781), (3, 42738927), (7, 18316683), (9, 14246309), (11, 11656071), (21, 6105561), (33, 3885357), (49, 2616669), (63, 2035187), (77, 1665153), (99, 1295119), (147, 872223), (231, 555051), (441, 290741), (539, 237879), (693, 185017), (1617, 79293), (4851, 26431)]