19971889

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{7297}}^1$

素因数の和:7344

約数の個数: 16

約数和(自身を含む): 25221888

約数和(自身を除く): 5249999

約数列:

[1, 7, 17, 23, 119, 161, 391, 2737, 7297, 51079, 124049, 167831, 868343, 1174817, 2853127, 19971889]

約数ペア:

[(1, 19971889), (7, 2853127), (17, 1174817), (23, 868343), (119, 167831), (161, 124049), (391, 51079), (2737, 7297)]