21741681

素因数分解:

$3^1\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1$

素因数の和:146

約数の個数: 48

約数和(自身を含む): 34491840

約数和(自身を除く): 12750159

約数列:

[1, 3, 13, 19, 37, 39, 57, 61, 111, 169, 183, 247, 481, 507, 703, 741, 793, 1159, 1443, 2109, 2257, 2379, 3211, 3477, 6253, 6771, 9139, 9633, 10309, 15067, 18759, 27417, 29341, 30927, 42883, 45201, 88023, 118807, 128649, 195871, 356421, 381433, 557479, 587613, 1144299, 1672437, 7247227, 21741681]

約数ペア:

[(1, 21741681), (3, 7247227), (13, 1672437), (19, 1144299), (37, 587613), (39, 557479), (57, 381433), (61, 356421), (111, 195871), (169, 128649), (183, 118807), (247, 88023), (481, 45201), (507, 42883), (703, 30927), (741, 29341), (793, 27417), (1159, 18759), (1443, 15067), (2109, 10309), (2257, 9633), (2379, 9139), (3211, 6771), (3477, 6253)]