21664017

素因数分解:

$3^4\times {\mathrm{71}}^1\times {\mathrm{3767}}^1$

素因数の和:3850

約数の個数: 20

約数和(自身を含む): 32826816

約数和(自身を除く): 11162799

約数列:

[1, 3, 9, 27, 71, 81, 213, 639, 1917, 3767, 5751, 11301, 33903, 101709, 267457, 305127, 802371, 2407113, 7221339, 21664017]

約数ペア:

[(1, 21664017), (3, 7221339), (9, 2407113), (27, 802371), (71, 305127), (81, 267457), (213, 101709), (639, 33903), (1917, 11301), (3767, 5751)]