80140400

素因数分解:

$2^4\times 5^2\times {\mathrm{200351}}^1$

素因数の和:200369

約数の個数: 30

約数和(自身を含む): 192538272

約数和(自身を除く): 112397872

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 200351, 400702, 801404, 1001755, 1602808, 2003510, 3205616, 4007020, 5008775, 8014040, 10017550, 16028080, 20035100, 40070200, 80140400]

約数ペア:

[(1, 80140400), (2, 40070200), (4, 20035100), (5, 16028080), (8, 10017550), (10, 8014040), (16, 5008775), (20, 4007020), (25, 3205616), (40, 2003510), (50, 1602808), (80, 1001755), (100, 801404), (200, 400702), (400, 200351)]