199400450

素因数分解:

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

素因数の和:4006

約数の個数: 18

約数和(自身を含む): 371070651

約数和(自身を除く): 171670201

約数列:

[1, 2, 5, 10, 25, 50, 1997, 3994, 9985, 19970, 49925, 99850, 3988009, 7976018, 19940045, 39880090, 99700225, 199400450]

約数ペア:

[(1, 199400450), (2, 99700225), (5, 39880090), (10, 19940045), (25, 7976018), (50, 3988009), (1997, 99850), (3994, 49925), (9985, 19970)]