12900400

素因数分解:

$2^4\times 5^2\times {\mathrm{32251}}^1$

素因数の和:32269

約数の個数: 30

約数和(自身を含む): 30994172

約数和(自身を除く): 18093772

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 32251, 64502, 129004, 161255, 258008, 322510, 516016, 645020, 806275, 1290040, 1612550, 2580080, 3225100, 6450200, 12900400]

約数ペア:

[(1, 12900400), (2, 6450200), (4, 3225100), (5, 2580080), (8, 1612550), (10, 1290040), (16, 806275), (20, 645020), (25, 516016), (40, 322510), (50, 258008), (80, 161255), (100, 129004), (200, 64502), (400, 32251)]