21978860

素因数分解:

$2^2\times 5^1\times {\mathrm{313}}^1\times {\mathrm{3511}}^1$

素因数の和:3833

約数の個数: 24

約数和(自身を含む): 46316256

約数和(自身を除く): 24337396

約数列:

[1, 2, 4, 5, 10, 20, 313, 626, 1252, 1565, 3130, 3511, 6260, 7022, 14044, 17555, 35110, 70220, 1098943, 2197886, 4395772, 5494715, 10989430, 21978860]

約数ペア:

[(1, 21978860), (2, 10989430), (4, 5494715), (5, 4395772), (10, 2197886), (20, 1098943), (313, 70220), (626, 35110), (1252, 17555), (1565, 14044), (3130, 7022), (3511, 6260)]