199809940

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{227}}^1\times {\mathrm{4001}}^1$

素因数の和:4248

約数の個数: 48

約数和(自身を含む): 459877824

約数和(自身を除く): 260067884

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 227, 454, 908, 1135, 2270, 2497, 4001, 4540, 4994, 8002, 9988, 12485, 16004, 20005, 24970, 40010, 44011, 49940, 80020, 88022, 176044, 220055, 440110, 880220, 908227, 1816454, 3632908, 4541135, 9082270, 9990497, 18164540, 19980994, 39961988, 49952485, 99904970, 199809940]

約数ペア:

[(1, 199809940), (2, 99904970), (4, 49952485), (5, 39961988), (10, 19980994), (11, 18164540), (20, 9990497), (22, 9082270), (44, 4541135), (55, 3632908), (110, 1816454), (220, 908227), (227, 880220), (454, 440110), (908, 220055), (1135, 176044), (2270, 88022), (2497, 80020), (4001, 49940), (4540, 44011), (4994, 40010), (8002, 24970), (9988, 20005), (12485, 16004)]