21204680

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{75731}}^1$

素因数の和:75749

約数の個数: 32

約数和(自身を含む): 54527040

約数和(自身を除く): 33322360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 75731, 151462, 302924, 378655, 530117, 605848, 757310, 1060234, 1514620, 2120468, 2650585, 3029240, 4240936, 5301170, 10602340, 21204680]

約数ペア:

[(1, 21204680), (2, 10602340), (4, 5301170), (5, 4240936), (7, 3029240), (8, 2650585), (10, 2120468), (14, 1514620), (20, 1060234), (28, 757310), (35, 605848), (40, 530117), (56, 378655), (70, 302924), (140, 151462), (280, 75731)]