21207268

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{263}}^1\times {\mathrm{1061}}^1$

素因数の和:1347

約数の個数: 24

約数和(自身を含む): 39251520

約数和(自身を除く): 18044252

約数列:

[1, 2, 4, 19, 38, 76, 263, 526, 1052, 1061, 2122, 4244, 4997, 9994, 19988, 20159, 40318, 80636, 279043, 558086, 1116172, 5301817, 10603634, 21207268]

約数ペア:

[(1, 21207268), (2, 10603634), (4, 5301817), (19, 1116172), (38, 558086), (76, 279043), (263, 80636), (526, 40318), (1052, 20159), (1061, 19988), (2122, 9994), (4244, 4997)]