20372990

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{2081}}^1$

素因数の和:2188

約数の個数: 32

約数和(自身を含む): 40474080

約数和(自身を除く): 20101090

約数列:

[1, 2, 5, 10, 11, 22, 55, 89, 110, 178, 445, 890, 979, 1958, 2081, 4162, 4895, 9790, 10405, 20810, 22891, 45782, 114455, 185209, 228910, 370418, 926045, 1852090, 2037299, 4074598, 10186495, 20372990]

約数ペア:

[(1, 20372990), (2, 10186495), (5, 4074598), (10, 2037299), (11, 1852090), (22, 926045), (55, 370418), (89, 228910), (110, 185209), (178, 114455), (445, 45782), (890, 22891), (979, 20810), (1958, 10405), (2081, 9790), (4162, 4895)]