20654326864

素因数分解:

$2^4\times {\mathrm{991}}^1\times {\mathrm{1009}}^1\times {\mathrm{1291}}^1$

素因数の和:3299

約数の個数: 40

約数和(自身を含む): 40128899840

約数和(自身を除く): 19474572976

約数列:

[1, 2, 4, 8, 16, 991, 1009, 1291, 1982, 2018, 2582, 3964, 4036, 5164, 7928, 8072, 10328, 15856, 16144, 20656, 999919, 1279381, 1302619, 1999838, 2558762, 2605238, 3999676, 5117524, 5210476, 7999352, 10235048, 10420952, 15998704, 20470096, 20841904, 1290895429, 2581790858, 5163581716, 10327163432, 20654326864]

約数ペア:

[(1, 20654326864), (2, 10327163432), (4, 5163581716), (8, 2581790858), (16, 1290895429), (991, 20841904), (1009, 20470096), (1291, 15998704), (1982, 10420952), (2018, 10235048), (2582, 7999352), (3964, 5210476), (4036, 5117524), (5164, 3999676), (7928, 2605238), (8072, 2558762), (10328, 1999838), (15856, 1302619), (16144, 1279381), (20656, 999919)]