20618876

素因数分解:

$2^2\times {\mathrm{19}}^2\times {\mathrm{109}}^1\times {\mathrm{131}}^1$

素因数の和:282

約数の個数: 36

約数和(自身を含む): 38724840

約数和(自身を除く): 18105964

約数列:

[1, 2, 4, 19, 38, 76, 109, 131, 218, 262, 361, 436, 524, 722, 1444, 2071, 2489, 4142, 4978, 8284, 9956, 14279, 28558, 39349, 47291, 57116, 78698, 94582, 157396, 189164, 271301, 542602, 1085204, 5154719, 10309438, 20618876]

約数ペア:

[(1, 20618876), (2, 10309438), (4, 5154719), (19, 1085204), (38, 542602), (76, 271301), (109, 189164), (131, 157396), (218, 94582), (262, 78698), (361, 57116), (436, 47291), (524, 39349), (722, 28558), (1444, 14279), (2071, 9956), (2489, 8284), (4142, 4978)]