21685885

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{127}}^1$

素因数の和:253

約数の個数: 32

約数和(自身を含む): 29417472

約数和(自身を除く): 7731587

約数列:

[1, 5, 13, 37, 65, 71, 127, 185, 355, 481, 635, 923, 1651, 2405, 2627, 4615, 4699, 8255, 9017, 13135, 23495, 34151, 45085, 61087, 117221, 170755, 305435, 333629, 586105, 1668145, 4337177, 21685885]

約数ペア:

[(1, 21685885), (5, 4337177), (13, 1668145), (37, 586105), (65, 333629), (71, 305435), (127, 170755), (185, 117221), (355, 61087), (481, 45085), (635, 34151), (923, 23495), (1651, 13135), (2405, 9017), (2627, 8255), (4615, 4699)]