21157118

素因数分解:

$2^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{109}}^1$

素因数の和:252

約数の個数: 32

約数和(自身を含む): 34209120

約数和(自身を除く): 13052002

約数列:

[1, 2, 37, 43, 61, 74, 86, 109, 122, 218, 1591, 2257, 2623, 3182, 4033, 4514, 4687, 5246, 6649, 8066, 9374, 13298, 97051, 173419, 194102, 246013, 285907, 346838, 492026, 571814, 10578559, 21157118]

約数ペア:

[(1, 21157118), (2, 10578559), (37, 571814), (43, 492026), (61, 346838), (74, 285907), (86, 246013), (109, 194102), (122, 173419), (218, 97051), (1591, 13298), (2257, 9374), (2623, 8066), (3182, 6649), (4033, 5246), (4514, 4687)]