21106257

素因数分解:

$3^1\times {\mathrm{31}}^1\times {\mathrm{127}}^1\times {\mathrm{1787}}^1$

素因数の和:1948

約数の個数: 16

約数和(自身を含む): 29294592

約数和(自身を除く): 8188335

約数列:

[1, 3, 31, 93, 127, 381, 1787, 3937, 5361, 11811, 55397, 166191, 226949, 680847, 7035419, 21106257]

約数ペア:

[(1, 21106257), (3, 7035419), (31, 680847), (93, 226949), (127, 166191), (381, 55397), (1787, 11811), (3937, 5361)]