20928920

素因数分解:

$2^3\times 5^1\times {\mathrm{193}}^1\times {\mathrm{2711}}^1$

素因数の和:2915

約数の個数: 32

約数和(自身を含む): 47351520

約数和(自身を除く): 26422600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 193, 386, 772, 965, 1544, 1930, 2711, 3860, 5422, 7720, 10844, 13555, 21688, 27110, 54220, 108440, 523223, 1046446, 2092892, 2616115, 4185784, 5232230, 10464460, 20928920]

約数ペア:

[(1, 20928920), (2, 10464460), (4, 5232230), (5, 4185784), (8, 2616115), (10, 2092892), (20, 1046446), (40, 523223), (193, 108440), (386, 54220), (772, 27110), (965, 21688), (1544, 13555), (1930, 10844), (2711, 7720), (3860, 5422)]