81782990

素因数分解:

$2^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{2137}}^1$

素因数の和:2276

約数の個数: 32

約数和(自身を含む): 152396640

約数和(自身を除く): 70613650

約数列:

[1, 2, 5, 10, 43, 86, 89, 178, 215, 430, 445, 890, 2137, 3827, 4274, 7654, 10685, 19135, 21370, 38270, 91891, 183782, 190193, 380386, 459455, 918910, 950965, 1901930, 8178299, 16356598, 40891495, 81782990]

約数ペア:

[(1, 81782990), (2, 40891495), (5, 16356598), (10, 8178299), (43, 1901930), (86, 950965), (89, 918910), (178, 459455), (215, 380386), (430, 190193), (445, 183782), (890, 91891), (2137, 38270), (3827, 21370), (4274, 19135), (7654, 10685)]