21157521

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{91591}}^1$

素因数の和:91612

約数の個数: 16

約数和(自身を含む): 35171328

約数和(自身を除く): 14013807

約数列:

[1, 3, 7, 11, 21, 33, 77, 231, 91591, 274773, 641137, 1007501, 1923411, 3022503, 7052507, 21157521]

約数ペア:

[(1, 21157521), (3, 7052507), (7, 3022503), (11, 1923411), (21, 1007501), (33, 641137), (77, 274773), (231, 91591)]