81646640

素因数分解:

$2^4\times 5^1\times {\mathrm{1020583}}^1$

素因数の和:1020596

約数の個数: 20

約数和(自身を含む): 189828624

約数和(自身を除く): 108181984

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1020583, 2041166, 4082332, 5102915, 8164664, 10205830, 16329328, 20411660, 40823320, 81646640]

約数ペア:

[(1, 81646640), (2, 40823320), (4, 20411660), (5, 16329328), (8, 10205830), (10, 8164664), (16, 5102915), (20, 4082332), (40, 2041166), (80, 1020583)]