21310175

素因数分解:

$5^2\times {\mathrm{31}}^2\times {\mathrm{887}}^1$

素因数の和:959

約数の個数: 18

約数和(自身を含む): 27335304

約数和(自身を除く): 6025129

約数列:

[1, 5, 25, 31, 155, 775, 887, 961, 4435, 4805, 22175, 24025, 27497, 137485, 687425, 852407, 4262035, 21310175]

約数ペア:

[(1, 21310175), (5, 4262035), (25, 852407), (31, 687425), (155, 137485), (775, 27497), (887, 24025), (961, 22175), (4435, 4805)]