81279664

素因数分解:

$2^4\times {\mathrm{71}}^1\times {\mathrm{71549}}^1$

素因数の和:71628

約数の個数: 20

約数和(自身を含む): 159699600

約数和(自身を除く): 78419936

約数列:

[1, 2, 4, 8, 16, 71, 142, 284, 568, 1136, 71549, 143098, 286196, 572392, 1144784, 5079979, 10159958, 20319916, 40639832, 81279664]

約数ペア:

[(1, 81279664), (2, 40639832), (4, 20319916), (8, 10159958), (16, 5079979), (71, 1144784), (142, 572392), (284, 286196), (568, 143098), (1136, 71549)]