21396755

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{2851}}^1$

素因数の和:2954

約数の個数: 16

約数和(自身を含む): 27379200

約数和(自身を除く): 5982445

約数列:

[1, 5, 19, 79, 95, 395, 1501, 2851, 7505, 14255, 54169, 225229, 270845, 1126145, 4279351, 21396755]

約数ペア:

[(1, 21396755), (5, 4279351), (19, 1126145), (79, 270845), (95, 225229), (395, 54169), (1501, 14255), (2851, 7505)]