21390523

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{14621}}^1$

素因数の和:14658

約数の個数: 16

約数和(自身を含む): 28074240

約数和(自身を除く): 6683717

約数列:

[1, 7, 11, 19, 77, 133, 209, 1463, 14621, 102347, 160831, 277799, 1125817, 1944593, 3055789, 21390523]

約数ペア:

[(1, 21390523), (7, 3055789), (11, 1944593), (19, 1125817), (77, 277799), (133, 160831), (209, 102347), (1463, 14621)]