21180555

素因数分解:

$3^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{839}}^1$

素因数の和:881

約数の個数: 64

約数和(自身を含む): 43545600

約数和(自身を除く): 22365045

約数列:

[1, 3, 5, 9, 11, 15, 17, 27, 33, 45, 51, 55, 85, 99, 135, 153, 165, 187, 255, 297, 459, 495, 561, 765, 839, 935, 1485, 1683, 2295, 2517, 2805, 4195, 5049, 7551, 8415, 9229, 12585, 14263, 22653, 25245, 27687, 37755, 42789, 46145, 71315, 83061, 113265, 128367, 138435, 156893, 213945, 249183, 385101, 415305, 470679, 641835, 784465, 1245915, 1412037, 1925505, 2353395, 4236111, 7060185, 21180555]

約数ペア:

[(1, 21180555), (3, 7060185), (5, 4236111), (9, 2353395), (11, 1925505), (15, 1412037), (17, 1245915), (27, 784465), (33, 641835), (45, 470679), (51, 415305), (55, 385101), (85, 249183), (99, 213945), (135, 156893), (153, 138435), (165, 128367), (187, 113265), (255, 83061), (297, 71315), (459, 46145), (495, 42789), (561, 37755), (765, 27687), (839, 25245), (935, 22653), (1485, 14263), (1683, 12585), (2295, 9229), (2517, 8415), (2805, 7551), (4195, 5049)]