128244400

素因数分解:

$2^4\times 5^2\times {\mathrm{320611}}^1$

素因数の和:320629

約数の個数: 30

約数和(自身を含む): 308108132

約数和(自身を除く): 179863732

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 320611, 641222, 1282444, 1603055, 2564888, 3206110, 5129776, 6412220, 8015275, 12824440, 16030550, 25648880, 32061100, 64122200, 128244400]

約数ペア:

[(1, 128244400), (2, 64122200), (4, 32061100), (5, 25648880), (8, 16030550), (10, 12824440), (16, 8015275), (20, 6412220), (25, 5129776), (40, 3206110), (50, 2564888), (80, 1603055), (100, 1282444), (200, 641222), (400, 320611)]