21656677

素因数分解:

$7^3\times {\mathrm{103}}^1\times {\mathrm{613}}^1$

素因数の和:737

約数の個数: 16

約数和(自身を含む): 25542400

約数和(自身を除く): 3885723

約数列:

[1, 7, 49, 103, 343, 613, 721, 4291, 5047, 30037, 35329, 63139, 210259, 441973, 3093811, 21656677]

約数ペア:

[(1, 21656677), (7, 3093811), (49, 441973), (103, 210259), (343, 63139), (613, 35329), (721, 30037), (4291, 5047)]