21690440

素因数分解:

$2^3\times 5^1\times {\mathrm{542261}}^1$

素因数の和:542272

約数の個数: 16

約数和(自身を含む): 48803580

約数和(自身を除く): 27113140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 542261, 1084522, 2169044, 2711305, 4338088, 5422610, 10845220, 21690440]

約数ペア:

[(1, 21690440), (2, 10845220), (4, 5422610), (5, 4338088), (8, 2711305), (10, 2169044), (20, 1084522), (40, 542261)]