21660279

素因数分解:

$3^1\times {\mathrm{47}}^1\times {\mathrm{149}}^1\times {\mathrm{1031}}^1$

素因数の和:1230

約数の個数: 16

約数和(自身を含む): 29721600

約数和(自身を除く): 8061321

約数列:

[1, 3, 47, 141, 149, 447, 1031, 3093, 7003, 21009, 48457, 145371, 153619, 460857, 7220093, 21660279]

約数ペア:

[(1, 21660279), (3, 7220093), (47, 460857), (141, 153619), (149, 145371), (447, 48457), (1031, 21009), (3093, 7003)]