81580640

素因数分解:

$2^5\times 5^1\times {\mathrm{509879}}^1$

素因数の和:509894

約数の個数: 24

約数和(自身を含む): 192734640

約数和(自身を除く): 111154000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 509879, 1019758, 2039516, 2549395, 4079032, 5098790, 8158064, 10197580, 16316128, 20395160, 40790320, 81580640]

約数ペア:

[(1, 81580640), (2, 40790320), (4, 20395160), (5, 16316128), (8, 10197580), (10, 8158064), (16, 5098790), (20, 4079032), (32, 2549395), (40, 2039516), (80, 1019758), (160, 509879)]