21027727

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{131}}^1\times {\mathrm{997}}^1$

素因数の和:1158

約数の個数: 16

約数和(自身を含む): 25293312

約数和(自身を除く): 4265585

約数列:

[1, 7, 23, 131, 161, 917, 997, 3013, 6979, 21091, 22931, 130607, 160517, 914249, 3003961, 21027727]

約数ペア:

[(1, 21027727), (7, 3003961), (23, 914249), (131, 160517), (161, 130607), (917, 22931), (997, 21091), (3013, 6979)]