20091208

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{1009}}^1$

素因数の和:1165

約数の個数: 32

約数和(自身を含む): 39996000

約数和(自身を除く): 19904792

約数列:

[1, 2, 4, 8, 19, 38, 76, 131, 152, 262, 524, 1009, 1048, 2018, 2489, 4036, 4978, 8072, 9956, 19171, 19912, 38342, 76684, 132179, 153368, 264358, 528716, 1057432, 2511401, 5022802, 10045604, 20091208]

約数ペア:

[(1, 20091208), (2, 10045604), (4, 5022802), (8, 2511401), (19, 1057432), (38, 528716), (76, 264358), (131, 153368), (152, 132179), (262, 76684), (524, 38342), (1009, 19912), (1048, 19171), (2018, 9956), (2489, 8072), (4036, 4978)]