81291825

素因数分解:

$3^2\times 5^2\times {\mathrm{439}}^1\times {\mathrm{823}}^1$

素因数の和:1278

約数の個数: 36

約数和(自身を含む): 146111680

約数和(自身を除く): 64819855

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 225, 439, 823, 1317, 2195, 2469, 3951, 4115, 6585, 7407, 10975, 12345, 19755, 20575, 32925, 37035, 61725, 98775, 185175, 361297, 1083891, 1806485, 3251673, 5419455, 9032425, 16258365, 27097275, 81291825]

約数ペア:

[(1, 81291825), (3, 27097275), (5, 16258365), (9, 9032425), (15, 5419455), (25, 3251673), (45, 1806485), (75, 1083891), (225, 361297), (439, 185175), (823, 98775), (1317, 61725), (2195, 37035), (2469, 32925), (3951, 20575), (4115, 19755), (6585, 12345), (7407, 10975)]