19999856

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{65789}}^1$

素因数の和:65816

約数の個数: 20

約数和(自身を含む): 40789800

約数和(自身を除く): 20789944

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 65789, 131578, 263156, 526312, 1052624, 1249991, 2499982, 4999964, 9999928, 19999856]

約数ペア:

[(1, 19999856), (2, 9999928), (4, 4999964), (8, 2499982), (16, 1249991), (19, 1052624), (38, 526312), (76, 263156), (152, 131578), (304, 65789)]