20987710

素因数分解:

$2^1\times 5^1\times {\mathrm{419}}^1\times {\mathrm{5009}}^1$

素因数の和:5435

約数の個数: 16

約数和(自身を含む): 37875600

約数和(自身を除く): 16887890

約数列:

[1, 2, 5, 10, 419, 838, 2095, 4190, 5009, 10018, 25045, 50090, 2098771, 4197542, 10493855, 20987710]

約数ペア:

[(1, 20987710), (2, 10493855), (5, 4197542), (10, 2098771), (419, 50090), (838, 25045), (2095, 10018), (4190, 5009)]