21489381

素因数分解:

$3^4\times {\mathrm{359}}^1\times {\mathrm{739}}^1$

素因数の和:1110

約数の個数: 20

約数和(自身を含む): 32234400

約数和(自身を除く): 10745019

約数列:

[1, 3, 9, 27, 81, 359, 739, 1077, 2217, 3231, 6651, 9693, 19953, 29079, 59859, 265301, 795903, 2387709, 7163127, 21489381]

約数ペア:

[(1, 21489381), (3, 7163127), (9, 2387709), (27, 795903), (81, 265301), (359, 59859), (739, 29079), (1077, 19953), (2217, 9693), (3231, 6651)]