81411640

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{119723}}^1$

素因数の和:119751

約数の個数: 32

約数和(自身を含む): 193952880

約数和(自身を除く): 112541240

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 119723, 239446, 478892, 598615, 957784, 1197230, 2035291, 2394460, 4070582, 4788920, 8141164, 10176455, 16282328, 20352910, 40705820, 81411640]

約数ペア:

[(1, 81411640), (2, 40705820), (4, 20352910), (5, 16282328), (8, 10176455), (10, 8141164), (17, 4788920), (20, 4070582), (34, 2394460), (40, 2035291), (68, 1197230), (85, 957784), (136, 598615), (170, 478892), (340, 239446), (680, 119723)]