20945981

素因数分解:

$7^3\times {\mathrm{79}}^1\times {\mathrm{773}}^1$

素因数の和:873

約数の個数: 16

約数和(自身を含む): 24768000

約数和(自身を除く): 3822019

約数列:

[1, 7, 49, 79, 343, 553, 773, 3871, 5411, 27097, 37877, 61067, 265139, 427469, 2992283, 20945981]

約数ペア:

[(1, 20945981), (7, 2992283), (49, 427469), (79, 265139), (343, 61067), (553, 37877), (773, 27097), (3871, 5411)]