20745291

素因数分解:

$3^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{7541}}^1$

素因数の和:7682

約数の個数: 16

約数和(自身を含む): 31857408

約数和(自身を除く): 11112117

約数列:

[1, 3, 7, 21, 131, 393, 917, 2751, 7541, 22623, 52787, 158361, 987871, 2963613, 6915097, 20745291]

約数ペア:

[(1, 20745291), (3, 6915097), (7, 2963613), (21, 987871), (131, 158361), (393, 52787), (917, 22623), (2751, 7541)]