19902388

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{2273}}^1$

素因数の和:2487

約数の個数: 24

約数和(自身を含む): 38203200

約数和(自身を除く): 18300812

約数列:

[1, 2, 4, 11, 22, 44, 199, 398, 796, 2189, 2273, 4378, 4546, 8756, 9092, 25003, 50006, 100012, 452327, 904654, 1809308, 4975597, 9951194, 19902388]

約数ペア:

[(1, 19902388), (2, 9951194), (4, 4975597), (11, 1809308), (22, 904654), (44, 452327), (199, 100012), (398, 50006), (796, 25003), (2189, 9092), (2273, 8756), (4378, 4546)]