21891295

素因数分解:

$5^1\times {\mathrm{79}}^1\times {\mathrm{157}}^1\times {\mathrm{353}}^1$

素因数の和:594

約数の個数: 16

約数和(自身を含む): 26847360

約数和(自身を除く): 4956065

約数列:

[1, 5, 79, 157, 353, 395, 785, 1765, 12403, 27887, 55421, 62015, 139435, 277105, 4378259, 21891295]

約数ペア:

[(1, 21891295), (5, 4378259), (79, 277105), (157, 139435), (353, 62015), (395, 55421), (785, 27887), (1765, 12403)]