21201663

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{7591}}^1$

素因数の和:7627

約数の個数: 24

約数和(自身を含む): 34619520

約数和(自身を除く): 13417857

約数列:

[1, 3, 7, 19, 21, 49, 57, 133, 147, 399, 931, 2793, 7591, 22773, 53137, 144229, 159411, 371959, 432687, 1009603, 1115877, 3028809, 7067221, 21201663]

約数ペア:

[(1, 21201663), (3, 7067221), (7, 3028809), (19, 1115877), (21, 1009603), (49, 432687), (57, 371959), (133, 159411), (147, 144229), (399, 53137), (931, 22773), (2793, 7591)]