17721891

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{181}}^1$

素因数の和:264

約数の個数: 48

約数和(自身を含む): 29981952

約数和(自身を除く): 12260061

約数列:

[1, 3, 9, 11, 23, 33, 43, 69, 99, 129, 181, 207, 253, 387, 473, 543, 759, 989, 1419, 1629, 1991, 2277, 2967, 4163, 4257, 5973, 7783, 8901, 10879, 12489, 17919, 23349, 32637, 37467, 45793, 70047, 85613, 97911, 137379, 179009, 256839, 412137, 537027, 770517, 1611081, 1969099, 5907297, 17721891]

約数ペア:

[(1, 17721891), (3, 5907297), (9, 1969099), (11, 1611081), (23, 770517), (33, 537027), (43, 412137), (69, 256839), (99, 179009), (129, 137379), (181, 97911), (207, 85613), (253, 70047), (387, 45793), (473, 37467), (543, 32637), (759, 23349), (989, 17919), (1419, 12489), (1629, 10879), (1991, 8901), (2277, 7783), (2967, 5973), (4163, 4257)]