19919949

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{827}}^1$

素因数の和:905

約数の個数: 32

約数和(自身を含む): 32219136

約数和(自身を除く): 12299187

約数列:

[1, 3, 7, 21, 31, 37, 93, 111, 217, 259, 651, 777, 827, 1147, 2481, 3441, 5789, 8029, 17367, 24087, 25637, 30599, 76911, 91797, 179459, 214193, 538377, 642579, 948569, 2845707, 6639983, 19919949]

約数ペア:

[(1, 19919949), (3, 6639983), (7, 2845707), (21, 948569), (31, 642579), (37, 538377), (93, 214193), (111, 179459), (217, 91797), (259, 76911), (651, 30599), (777, 25637), (827, 24087), (1147, 17367), (2481, 8029), (3441, 5789)]