21121288

素因数分解:

$2^3\times {\mathrm{257}}^1\times {\mathrm{10273}}^1$

素因数の和:10536

約数の個数: 16

約数和(自身を含む): 39760380

約数和(自身を除く): 18639092

約数列:

[1, 2, 4, 8, 257, 514, 1028, 2056, 10273, 20546, 41092, 82184, 2640161, 5280322, 10560644, 21121288]

約数ペア:

[(1, 21121288), (2, 10560644), (4, 5280322), (8, 2640161), (257, 82184), (514, 41092), (1028, 20546), (2056, 10273)]