21244245

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{647}}^1$

素因数の和:865

約数の個数: 32

約数和(自身を含む): 37324800

約数和(自身を除く): 16080555

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 199, 597, 647, 995, 1941, 2189, 2985, 3235, 6567, 7117, 9705, 10945, 21351, 32835, 35585, 106755, 128753, 386259, 643765, 1416283, 1931295, 4248849, 7081415, 21244245]

約数ペア:

[(1, 21244245), (3, 7081415), (5, 4248849), (11, 1931295), (15, 1416283), (33, 643765), (55, 386259), (165, 128753), (199, 106755), (597, 35585), (647, 32835), (995, 21351), (1941, 10945), (2189, 9705), (2985, 7117), (3235, 6567)]