81231956

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{311}}^1\times {\mathrm{5023}}^1$

素因数の和:5351

約数の個数: 24

約数和(自身を含む): 153613824

約数和(自身を除く): 72381868

約数列:

[1, 2, 4, 13, 26, 52, 311, 622, 1244, 4043, 5023, 8086, 10046, 16172, 20092, 65299, 130598, 261196, 1562153, 3124306, 6248612, 20307989, 40615978, 81231956]

約数ペア:

[(1, 81231956), (2, 40615978), (4, 20307989), (13, 6248612), (26, 3124306), (52, 1562153), (311, 261196), (622, 130598), (1244, 65299), (4043, 20092), (5023, 16172), (8086, 10046)]