189999999

素因数分解:

$3^9\times 7^2\times {\mathrm{197}}^1$

素因数の和:238

約数の個数: 60

約数和(自身を含む): 333207864

約数和(自身を除く): 143207865

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 81, 147, 189, 197, 243, 441, 567, 591, 729, 1323, 1379, 1701, 1773, 2187, 3969, 4137, 5103, 5319, 6561, 9653, 11907, 12411, 15309, 15957, 19683, 28959, 35721, 37233, 45927, 47871, 86877, 107163, 111699, 137781, 143613, 260631, 321489, 335097, 430839, 781893, 964467, 1005291, 1292517, 2345679, 3015873, 3877551, 7037037, 9047619, 21111111, 27142857, 63333333, 189999999]

約数ペア:

[(1, 189999999), (3, 63333333), (7, 27142857), (9, 21111111), (21, 9047619), (27, 7037037), (49, 3877551), (63, 3015873), (81, 2345679), (147, 1292517), (189, 1005291), (197, 964467), (243, 781893), (441, 430839), (567, 335097), (591, 321489), (729, 260631), (1323, 143613), (1379, 137781), (1701, 111699), (1773, 107163), (2187, 86877), (3969, 47871), (4137, 45927), (5103, 37233), (5319, 35721), (6561, 28959), (9653, 19683), (11907, 15957), (12411, 15309)]