20783791

素因数分解:

$7^2\times {\mathrm{53}}^2\times {\mathrm{151}}^1$

素因数の和:271

約数の個数: 18

約数和(自身を含む): 24805032

約数和(自身を除く): 4021241

約数列:

[1, 7, 49, 53, 151, 371, 1057, 2597, 2809, 7399, 8003, 19663, 56021, 137641, 392147, 424159, 2969113, 20783791]

約数ペア:

[(1, 20783791), (7, 2969113), (49, 424159), (53, 392147), (151, 137641), (371, 56021), (1057, 19663), (2597, 8003), (2809, 7399)]