20542808

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17957}}^1$

素因数の和:17987

約数の個数: 32

約数和(自身を含む): 45254160

約数和(自身を除く): 24711352

約数列:

[1, 2, 4, 8, 11, 13, 22, 26, 44, 52, 88, 104, 143, 286, 572, 1144, 17957, 35914, 71828, 143656, 197527, 233441, 395054, 466882, 790108, 933764, 1580216, 1867528, 2567851, 5135702, 10271404, 20542808]

約数ペア:

[(1, 20542808), (2, 10271404), (4, 5135702), (8, 2567851), (11, 1867528), (13, 1580216), (22, 933764), (26, 790108), (44, 466882), (52, 395054), (88, 233441), (104, 197527), (143, 143656), (286, 71828), (572, 35914), (1144, 17957)]