20718436

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{2081}}^1$

素因数の和:2235

約数の個数: 24

約数和(自身を含む): 38475360

約数和(自身を除く): 17756924

約数列:

[1, 2, 4, 19, 38, 76, 131, 262, 524, 2081, 2489, 4162, 4978, 8324, 9956, 39539, 79078, 158156, 272611, 545222, 1090444, 5179609, 10359218, 20718436]

約数ペア:

[(1, 20718436), (2, 10359218), (4, 5179609), (19, 1090444), (38, 545222), (76, 272611), (131, 158156), (262, 79078), (524, 39539), (2081, 9956), (2489, 8324), (4162, 4978)]