21900040

素因数分解:

$2^3\times 5^1\times {\mathrm{547501}}^1$

素因数の和:547512

約数の個数: 16

約数和(自身を含む): 49275180

約数和(自身を除く): 27375140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 547501, 1095002, 2190004, 2737505, 4380008, 5475010, 10950020, 21900040]

約数ペア:

[(1, 21900040), (2, 10950020), (4, 5475010), (5, 4380008), (8, 2737505), (10, 2190004), (20, 1095002), (40, 547501)]