39400

素因数分解:

$2^3\times 5^2\times {\mathrm{197}}^1$

素因数の和:213

約数の個数: 24

約数和(自身を含む): 92070

約数和(自身を除く): 52670

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 197, 200, 394, 788, 985, 1576, 1970, 3940, 4925, 7880, 9850, 19700, 39400]

約数ペア:

[(1, 39400), (2, 19700), (4, 9850), (5, 7880), (8, 4925), (10, 3940), (20, 1970), (25, 1576), (40, 985), (50, 788), (100, 394), (197, 200)]