128209921

素因数分解:

$7^2\times {\mathrm{37}}^1\times {\mathrm{70717}}^1$

素因数の和:70768

約数の個数: 12

約数和(自身を含む): 153175188

約数和(自身を除く): 24965267

約数列:

[1, 7, 37, 49, 259, 1813, 70717, 495019, 2616529, 3465133, 18315703, 128209921]

約数ペア:

[(1, 128209921), (7, 18315703), (37, 3465133), (49, 2616529), (259, 495019), (1813, 70717)]