21221489919

素因数分解:

$3^1\times 7^3\times {\mathrm{20623411}}^1$

素因数の和:20623435

約数の個数: 16

約数和(自身を含む): 32997459200

約数和(自身を除く): 11775969281

約数列:

[1, 3, 7, 21, 49, 147, 343, 1029, 20623411, 61870233, 144363877, 433091631, 1010547139, 3031641417, 7073829973, 21221489919]

約数ペア:

[(1, 21221489919), (3, 7073829973), (7, 3031641417), (21, 1010547139), (49, 433091631), (147, 144363877), (343, 61870233), (1029, 20623411)]