21210440

素因数分解:

$2^3\times 5^1\times {\mathrm{530261}}^1$

素因数の和:530272

約数の個数: 16

約数和(自身を含む): 47723580

約数和(自身を除く): 26513140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 530261, 1060522, 2121044, 2651305, 4242088, 5302610, 10605220, 21210440]

約数ペア:

[(1, 21210440), (2, 10605220), (4, 5302610), (5, 4242088), (8, 2651305), (10, 2121044), (20, 1060522), (40, 530261)]