19959989

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{4091}}^1$

素因数の和:4156

約数の個数: 16

約数和(自身を含む): 24748416

約数和(自身を除く): 4788427

約数列:

[1, 7, 17, 41, 119, 287, 697, 4091, 4879, 28637, 69547, 167731, 486829, 1174117, 2851427, 19959989]

約数ペア:

[(1, 19959989), (7, 2851427), (17, 1174117), (41, 486829), (119, 167731), (287, 69547), (697, 28637), (4091, 4879)]