280228

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{317}}^1$

素因数の和:351

約数の個数: 24

約数和(自身を含む): 560952

約数和(自身を除く): 280724

約数列:

[1, 2, 4, 13, 17, 26, 34, 52, 68, 221, 317, 442, 634, 884, 1268, 4121, 5389, 8242, 10778, 16484, 21556, 70057, 140114, 280228]

約数ペア:

[(1, 280228), (2, 140114), (4, 70057), (13, 21556), (17, 16484), (26, 10778), (34, 8242), (52, 5389), (68, 4121), (221, 1268), (317, 884), (442, 634)]