20389684

素因数分解:

$2^2\times 7^2\times {\mathrm{23}}^1\times {\mathrm{4523}}^1$

素因数の和:4564

約数の個数: 36

約数和(自身を含む): 43321824

約数和(自身を除く): 22932140

約数列:

[1, 2, 4, 7, 14, 23, 28, 46, 49, 92, 98, 161, 196, 322, 644, 1127, 2254, 4508, 4523, 9046, 18092, 31661, 63322, 104029, 126644, 208058, 221627, 416116, 443254, 728203, 886508, 1456406, 2912812, 5097421, 10194842, 20389684]

約数ペア:

[(1, 20389684), (2, 10194842), (4, 5097421), (7, 2912812), (14, 1456406), (23, 886508), (28, 728203), (46, 443254), (49, 416116), (92, 221627), (98, 208058), (161, 126644), (196, 104029), (322, 63322), (644, 31661), (1127, 18092), (2254, 9046), (4508, 4523)]