21136190

素因数分解:

$2^1\times 5^1\times {\mathrm{109}}^1\times {\mathrm{19391}}^1$

素因数の和:19507

約数の個数: 16

約数和(自身を含む): 38396160

約数和(自身を除く): 17259970

約数列:

[1, 2, 5, 10, 109, 218, 545, 1090, 19391, 38782, 96955, 193910, 2113619, 4227238, 10568095, 21136190]

約数ペア:

[(1, 21136190), (2, 10568095), (5, 4227238), (10, 2113619), (109, 193910), (218, 96955), (545, 38782), (1090, 19391)]