199420420

素因数分解:

$2^2\times 5^1\times {\mathrm{1997}}^1\times {\mathrm{4993}}^1$

素因数の和:6999

約数の個数: 24

約数和(自身を含む): 419076504

約数和(自身を除く): 219656084

約数列:

[1, 2, 4, 5, 10, 20, 1997, 3994, 4993, 7988, 9985, 9986, 19970, 19972, 24965, 39940, 49930, 99860, 9971021, 19942042, 39884084, 49855105, 99710210, 199420420]

約数ペア:

[(1, 199420420), (2, 99710210), (4, 49855105), (5, 39884084), (10, 19942042), (20, 9971021), (1997, 99860), (3994, 49930), (4993, 39940), (7988, 24965), (9985, 19972), (9986, 19970)]