19827820

素因数分解:

$2^2\times 5^1\times {\mathrm{971}}^1\times {\mathrm{1021}}^1$

素因数の和:2001

約数の個数: 24

約数和(自身を含む): 41722128

約数和(自身を除く): 21894308

約数列:

[1, 2, 4, 5, 10, 20, 971, 1021, 1942, 2042, 3884, 4084, 4855, 5105, 9710, 10210, 19420, 20420, 991391, 1982782, 3965564, 4956955, 9913910, 19827820]

約数ペア:

[(1, 19827820), (2, 9913910), (4, 4956955), (5, 3965564), (10, 1982782), (20, 991391), (971, 20420), (1021, 19420), (1942, 10210), (2042, 9710), (3884, 5105), (4084, 4855)]