21040604

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{239}}^1\times {\mathrm{1693}}^1$

素因数の和:1949

約数の個数: 24

約数和(自身を含む): 39842880

約数和(自身を除く): 18802276

約数列:

[1, 2, 4, 13, 26, 52, 239, 478, 956, 1693, 3107, 3386, 6214, 6772, 12428, 22009, 44018, 88036, 404627, 809254, 1618508, 5260151, 10520302, 21040604]

約数ペア:

[(1, 21040604), (2, 10520302), (4, 5260151), (13, 1618508), (26, 809254), (52, 404627), (239, 88036), (478, 44018), (956, 22009), (1693, 12428), (3107, 6772), (3386, 6214)]