2800400

素因数分解:

$2^4\times 5^2\times {\mathrm{7001}}^1$

素因数の和:7019

約数の個数: 30

約数和(自身を含む): 6728922

約数和(自身を除く): 3928522

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 7001, 14002, 28004, 35005, 56008, 70010, 112016, 140020, 175025, 280040, 350050, 560080, 700100, 1400200, 2800400]

約数ペア:

[(1, 2800400), (2, 1400200), (4, 700100), (5, 560080), (8, 350050), (10, 280040), (16, 175025), (20, 140020), (25, 112016), (40, 70010), (50, 56008), (80, 35005), (100, 28004), (200, 14002), (400, 7001)]