21529641

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{53959}}^1$

素因数の和:53988

約数の個数: 16

約数和(自身を含む): 34534400

約数和(自身を除く): 13004759

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 53959, 161877, 377713, 1025221, 1133139, 3075663, 7176547, 21529641]

約数ペア:

[(1, 21529641), (3, 7176547), (7, 3075663), (19, 1133139), (21, 1025221), (57, 377713), (133, 161877), (399, 53959)]