21665655

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{23}}^1\times {\mathrm{173}}^1$

素因数の和:229

約数の個数: 72

約数和(自身を含む): 43321824

約数和(自身を除く): 21656169

約数列:

[1, 3, 5, 9, 11, 15, 23, 33, 45, 55, 69, 99, 115, 121, 165, 173, 207, 253, 345, 363, 495, 519, 605, 759, 865, 1035, 1089, 1265, 1557, 1815, 1903, 2277, 2595, 2783, 3795, 3979, 5445, 5709, 7785, 8349, 9515, 11385, 11937, 13915, 17127, 19895, 20933, 25047, 28545, 35811, 41745, 43769, 59685, 62799, 85635, 104665, 125235, 131307, 179055, 188397, 218845, 313995, 393921, 481459, 656535, 941985, 1444377, 1969605, 2407295, 4333131, 7221885, 21665655]

約数ペア:

[(1, 21665655), (3, 7221885), (5, 4333131), (9, 2407295), (11, 1969605), (15, 1444377), (23, 941985), (33, 656535), (45, 481459), (55, 393921), (69, 313995), (99, 218845), (115, 188397), (121, 179055), (165, 131307), (173, 125235), (207, 104665), (253, 85635), (345, 62799), (363, 59685), (495, 43769), (519, 41745), (605, 35811), (759, 28545), (865, 25047), (1035, 20933), (1089, 19895), (1265, 17127), (1557, 13915), (1815, 11937), (1903, 11385), (2277, 9515), (2595, 8349), (2783, 7785), (3795, 5709), (3979, 5445)]