20091909

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{151}}^1\times {\mathrm{2609}}^1$

素因数の和:2780

約数の個数: 16

約数和(自身を含む): 28563840

約数和(自身を除く): 8471931

約数列:

[1, 3, 17, 51, 151, 453, 2567, 2609, 7701, 7827, 44353, 133059, 393959, 1181877, 6697303, 20091909]

約数ペア:

[(1, 20091909), (3, 6697303), (17, 1181877), (51, 393959), (151, 133059), (453, 44353), (2567, 7827), (2609, 7701)]