81267440

素因数分解:

$2^4\times 5^1\times {\mathrm{1015843}}^1$

素因数の和:1015856

約数の個数: 20

約数和(自身を含む): 188946984

約数和(自身を除く): 107679544

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1015843, 2031686, 4063372, 5079215, 8126744, 10158430, 16253488, 20316860, 40633720, 81267440]

約数ペア:

[(1, 81267440), (2, 40633720), (4, 20316860), (5, 16253488), (8, 10158430), (10, 8126744), (16, 5079215), (20, 4063372), (40, 2031686), (80, 1015843)]