21807345

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{643}}^1$

素因数の和:694

約数の個数: 64

約数和(自身を含む): 44513280

約数和(自身を除く): 22705935

約数列:

[1, 3, 5, 7, 15, 17, 19, 21, 35, 51, 57, 85, 95, 105, 119, 133, 255, 285, 323, 357, 399, 595, 643, 665, 969, 1615, 1785, 1929, 1995, 2261, 3215, 4501, 4845, 6783, 9645, 10931, 11305, 12217, 13503, 22505, 32793, 33915, 36651, 54655, 61085, 67515, 76517, 85519, 163965, 183255, 207689, 229551, 256557, 382585, 427595, 623067, 1038445, 1147755, 1282785, 1453823, 3115335, 4361469, 7269115, 21807345]

約数ペア:

[(1, 21807345), (3, 7269115), (5, 4361469), (7, 3115335), (15, 1453823), (17, 1282785), (19, 1147755), (21, 1038445), (35, 623067), (51, 427595), (57, 382585), (85, 256557), (95, 229551), (105, 207689), (119, 183255), (133, 163965), (255, 85519), (285, 76517), (323, 67515), (357, 61085), (399, 54655), (595, 36651), (643, 33915), (665, 32793), (969, 22505), (1615, 13503), (1785, 12217), (1929, 11305), (1995, 10931), (2261, 9645), (3215, 6783), (4501, 4845)]