18955420

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{86161}}^1$

素因数の和:86181

約数の個数: 24

約数和(自身を含む): 43425648

約数和(自身を除く): 24470228

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 86161, 172322, 344644, 430805, 861610, 947771, 1723220, 1895542, 3791084, 4738855, 9477710, 18955420]

約数ペア:

[(1, 18955420), (2, 9477710), (4, 4738855), (5, 3791084), (10, 1895542), (11, 1723220), (20, 947771), (22, 861610), (44, 430805), (55, 344644), (110, 172322), (220, 86161)]