20781236

素因数分解:

$2^2\times 7^1\times {\mathrm{23}}^3\times {\mathrm{61}}^1$

素因数の和:141

約数の個数: 48

約数和(自身を含む): 44163840

約数和(自身を除く): 23382604

約数列:

[1, 2, 4, 7, 14, 23, 28, 46, 61, 92, 122, 161, 244, 322, 427, 529, 644, 854, 1058, 1403, 1708, 2116, 2806, 3703, 5612, 7406, 9821, 12167, 14812, 19642, 24334, 32269, 39284, 48668, 64538, 85169, 129076, 170338, 225883, 340676, 451766, 742187, 903532, 1484374, 2968748, 5195309, 10390618, 20781236]

約数ペア:

[(1, 20781236), (2, 10390618), (4, 5195309), (7, 2968748), (14, 1484374), (23, 903532), (28, 742187), (46, 451766), (61, 340676), (92, 225883), (122, 170338), (161, 129076), (244, 85169), (322, 64538), (427, 48668), (529, 39284), (644, 32269), (854, 24334), (1058, 19642), (1403, 14812), (1708, 12167), (2116, 9821), (2806, 7406), (3703, 5612)]