21767405

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{151}}^1\times {\mathrm{2621}}^1$

素因数の和:2788

約数の個数: 16

約数和(自身を含む): 28695168

約数和(自身を除く): 6927763

約数列:

[1, 5, 11, 55, 151, 755, 1661, 2621, 8305, 13105, 28831, 144155, 395771, 1978855, 4353481, 21767405]

約数ペア:

[(1, 21767405), (5, 4353481), (11, 1978855), (55, 395771), (151, 144155), (755, 28831), (1661, 13105), (2621, 8305)]