81503465

素因数分解:

$5^1\times {\mathrm{101}}^1\times {\mathrm{251}}^1\times {\mathrm{643}}^1$

素因数の和:1000

約数の個数: 16

約数和(自身を含む): 99320256

約数和(自身を除く): 17816791

約数列:

[1, 5, 101, 251, 505, 643, 1255, 3215, 25351, 64943, 126755, 161393, 324715, 806965, 16300693, 81503465]

約数ペア:

[(1, 81503465), (5, 16300693), (101, 806965), (251, 324715), (505, 161393), (643, 126755), (1255, 64943), (3215, 25351)]