81659440

素因数分解:

$2^4\times 5^1\times {\mathrm{1020743}}^1$

素因数の和:1020756

約数の個数: 20

約数和(自身を含む): 189858384

約数和(自身を除く): 108198944

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1020743, 2041486, 4082972, 5103715, 8165944, 10207430, 16331888, 20414860, 40829720, 81659440]

約数ペア:

[(1, 81659440), (2, 40829720), (4, 20414860), (5, 16331888), (8, 10207430), (10, 8165944), (16, 5103715), (20, 4082972), (40, 2041486), (80, 1020743)]