21004040

素因数分解:

$2^3\times 5^1\times {\mathrm{525101}}^1$

素因数の和:525112

約数の個数: 16

約数和(自身を含む): 47259180

約数和(自身を除く): 26255140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 525101, 1050202, 2100404, 2625505, 4200808, 5251010, 10502020, 21004040]

約数ペア:

[(1, 21004040), (2, 10502020), (4, 5251010), (5, 4200808), (8, 2625505), (10, 2100404), (20, 1050202), (40, 525101)]