21671221

素因数分解:

${\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{599}}^1$

素因数の和:657

約数の個数: 24

約数和(自身を含む): 26812800

約数和(自身を除く): 5141579

約数列:

[1, 11, 13, 23, 121, 143, 253, 299, 599, 1573, 2783, 3289, 6589, 7787, 13777, 36179, 72479, 85657, 151547, 179101, 942227, 1667017, 1970111, 21671221]

約数ペア:

[(1, 21671221), (11, 1970111), (13, 1667017), (23, 942227), (121, 179101), (143, 151547), (253, 85657), (299, 72479), (599, 36179), (1573, 13777), (2783, 7787), (3289, 6589)]