21521813

素因数分解:

${\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{2897}}^1$

素因数の和:2956

約数の個数: 16

約数和(自身を含む): 25038720

約数和(自身を除く): 3516907

約数列:

[1, 17, 19, 23, 323, 391, 437, 2897, 7429, 49249, 55043, 66631, 935731, 1132727, 1265989, 21521813]

約数ペア:

[(1, 21521813), (17, 1265989), (19, 1132727), (23, 935731), (323, 66631), (391, 55043), (437, 49249), (2897, 7429)]