20909512

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{1879}}^1$

素因数の和:2005

約数の個数: 32

約数和(自身を含む): 42638400

約数和(自身を除く): 21728888

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 107, 214, 428, 856, 1391, 1879, 2782, 3758, 5564, 7516, 11128, 15032, 24427, 48854, 97708, 195416, 201053, 402106, 804212, 1608424, 2613689, 5227378, 10454756, 20909512]

約数ペア:

[(1, 20909512), (2, 10454756), (4, 5227378), (8, 2613689), (13, 1608424), (26, 804212), (52, 402106), (104, 201053), (107, 195416), (214, 97708), (428, 48854), (856, 24427), (1391, 15032), (1879, 11128), (2782, 7516), (3758, 5564)]