21540243

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{83}}^1\times {\mathrm{157}}^1$

素因数の和:291

約数の個数: 32

約数和(自身を含む): 31852800

約数和(自身を除く): 10312557

約数列:

[1, 3, 19, 29, 57, 83, 87, 157, 249, 471, 551, 1577, 1653, 2407, 2983, 4553, 4731, 7221, 8949, 13031, 13659, 39093, 45733, 86507, 137199, 247589, 259521, 377899, 742767, 1133697, 7180081, 21540243]

約数ペア:

[(1, 21540243), (3, 7180081), (19, 1133697), (29, 742767), (57, 377899), (83, 259521), (87, 247589), (157, 137199), (249, 86507), (471, 45733), (551, 39093), (1577, 13659), (1653, 13031), (2407, 8949), (2983, 7221), (4553, 4731)]