20405164

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{1087}}^1$

素因数の和:1142

約数の個数: 36

約数和(自身を含む): 40623744

約数和(自身を除く): 20218580

約数列:

[1, 2, 4, 13, 19, 26, 38, 52, 76, 247, 361, 494, 722, 988, 1087, 1444, 2174, 4348, 4693, 9386, 14131, 18772, 20653, 28262, 41306, 56524, 82612, 268489, 392407, 536978, 784814, 1073956, 1569628, 5101291, 10202582, 20405164]

約数ペア:

[(1, 20405164), (2, 10202582), (4, 5101291), (13, 1569628), (19, 1073956), (26, 784814), (38, 536978), (52, 392407), (76, 268489), (247, 82612), (361, 56524), (494, 41306), (722, 28262), (988, 20653), (1087, 18772), (1444, 14131), (2174, 9386), (4348, 4693)]