21663260

素因数分解:

$2^2\times 5^1\times {\mathrm{991}}^1\times {\mathrm{1093}}^1$

素因数の和:2093

約数の個数: 24

約数和(自身を含む): 45580416

約数和(自身を除く): 23917156

約数列:

[1, 2, 4, 5, 10, 20, 991, 1093, 1982, 2186, 3964, 4372, 4955, 5465, 9910, 10930, 19820, 21860, 1083163, 2166326, 4332652, 5415815, 10831630, 21663260]

約数ペア:

[(1, 21663260), (2, 10831630), (4, 5415815), (5, 4332652), (10, 2166326), (20, 1083163), (991, 21860), (1093, 19820), (1982, 10930), (2186, 9910), (3964, 5465), (4372, 4955)]