21057799

素因数分解:

$7^3\times {\mathrm{29}}^2\times {\mathrm{73}}^1$

素因数の和:152

約数の個数: 24

約数和(自身を含む): 25781600

約数和(自身を除く): 4723801

約数列:

[1, 7, 29, 49, 73, 203, 343, 511, 841, 1421, 2117, 3577, 5887, 9947, 14819, 25039, 41209, 61393, 103733, 288463, 429751, 726131, 3008257, 21057799]

約数ペア:

[(1, 21057799), (7, 3008257), (29, 726131), (49, 429751), (73, 288463), (203, 103733), (343, 61393), (511, 41209), (841, 25039), (1421, 14819), (2117, 9947), (3577, 5887)]