81694640

素因数分解:

$2^4\times 5^1\times {\mathrm{1021183}}^1$

素因数の和:1021196

約数の個数: 20

約数和(自身を含む): 189940224

約数和(自身を除く): 108245584

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1021183, 2042366, 4084732, 5105915, 8169464, 10211830, 16338928, 20423660, 40847320, 81694640]

約数ペア:

[(1, 81694640), (2, 40847320), (4, 20423660), (5, 16338928), (8, 10211830), (10, 8169464), (16, 5105915), (20, 4084732), (40, 2042366), (80, 1021183)]