21878060

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{199}}^1\times {\mathrm{239}}^1$

素因数の和:470

約数の個数: 48

約数和(自身を含む): 48384000

約数和(自身を除く): 26505940

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 115, 199, 230, 239, 398, 460, 478, 796, 956, 995, 1195, 1990, 2390, 3980, 4577, 4780, 5497, 9154, 10994, 18308, 21988, 22885, 27485, 45770, 47561, 54970, 91540, 95122, 109940, 190244, 237805, 475610, 951220, 1093903, 2187806, 4375612, 5469515, 10939030, 21878060]

約数ペア:

[(1, 21878060), (2, 10939030), (4, 5469515), (5, 4375612), (10, 2187806), (20, 1093903), (23, 951220), (46, 475610), (92, 237805), (115, 190244), (199, 109940), (230, 95122), (239, 91540), (398, 54970), (460, 47561), (478, 45770), (796, 27485), (956, 22885), (995, 21988), (1195, 18308), (1990, 10994), (2390, 9154), (3980, 5497), (4577, 4780)]