81397855

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{113}}^1\times {\mathrm{1871}}^1$

素因数の和:2007

約数の個数: 32

約数和(自身を含む): 122923008

約数和(自身を除く): 41525153

約数列:

[1, 5, 7, 11, 35, 55, 77, 113, 385, 565, 791, 1243, 1871, 3955, 6215, 8701, 9355, 13097, 20581, 43505, 65485, 102905, 144067, 211423, 720335, 1057115, 1479961, 2325653, 7399805, 11628265, 16279571, 81397855]

約数ペア:

[(1, 81397855), (5, 16279571), (7, 11628265), (11, 7399805), (35, 2325653), (55, 1479961), (77, 1057115), (113, 720335), (385, 211423), (565, 144067), (791, 102905), (1243, 65485), (1871, 43505), (3955, 20581), (6215, 13097), (8701, 9355)]