18699790

素因数分解:

$2^1\times 5^1\times {\mathrm{89}}^1\times {\mathrm{21011}}^1$

素因数の和:21107

約数の個数: 16

約数和(自身を含む): 34039440

約数和(自身を除く): 15339650

約数列:

[1, 2, 5, 10, 89, 178, 445, 890, 21011, 42022, 105055, 210110, 1869979, 3739958, 9349895, 18699790]

約数ペア:

[(1, 18699790), (2, 9349895), (5, 3739958), (10, 1869979), (89, 210110), (178, 105055), (445, 42022), (890, 21011)]