991280

素因数分解:

$2^4\times 5^1\times {\mathrm{12391}}^1$

素因数の和:12404

約数の個数: 20

約数和(自身を含む): 2304912

約数和(自身を除く): 1313632

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 12391, 24782, 49564, 61955, 99128, 123910, 198256, 247820, 495640, 991280]

約数ペア:

[(1, 991280), (2, 495640), (4, 247820), (5, 198256), (8, 123910), (10, 99128), (16, 61955), (20, 49564), (40, 24782), (80, 12391)]