12689990

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^2\times {\mathrm{4391}}^1$

素因数の和:4432

約数の個数: 24

約数和(自身を含む): 24270192

約数和(自身を除く): 11580202

約数列:

[1, 2, 5, 10, 17, 34, 85, 170, 289, 578, 1445, 2890, 4391, 8782, 21955, 43910, 74647, 149294, 373235, 746470, 1268999, 2537998, 6344995, 12689990]

約数ペア:

[(1, 12689990), (2, 6344995), (5, 2537998), (10, 1268999), (17, 746470), (34, 373235), (85, 149294), (170, 74647), (289, 43910), (578, 21955), (1445, 8782), (2890, 4391)]