21005080

素因数分解:

$2^3\times 5^1\times {\mathrm{525127}}^1$

素因数の和:525138

約数の個数: 16

約数和(自身を含む): 47261520

約数和(自身を除く): 26256440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 525127, 1050254, 2100508, 2625635, 4201016, 5251270, 10502540, 21005080]

約数ペア:

[(1, 21005080), (2, 10502540), (4, 5251270), (5, 4201016), (8, 2625635), (10, 2100508), (20, 1050254), (40, 525127)]