20712279

素因数分解:

$3^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{7529}}^1$

素因数の和:7670

約数の個数: 16

約数和(自身を含む): 31806720

約数和(自身を除く): 11094441

約数列:

[1, 3, 7, 21, 131, 393, 917, 2751, 7529, 22587, 52703, 158109, 986299, 2958897, 6904093, 20712279]

約数ペア:

[(1, 20712279), (3, 6904093), (7, 2958897), (21, 986299), (131, 158109), (393, 52703), (917, 22587), (2751, 7529)]