21281697

素因数分解:

$3^7\times {\mathrm{37}}^1\times {\mathrm{263}}^1$

素因数の和:321

約数の個数: 32

約数和(自身を含む): 32904960

約数和(自身を除く): 11623263

約数列:

[1, 3, 9, 27, 37, 81, 111, 243, 263, 333, 729, 789, 999, 2187, 2367, 2997, 7101, 8991, 9731, 21303, 26973, 29193, 63909, 80919, 87579, 191727, 262737, 575181, 788211, 2364633, 7093899, 21281697]

約数ペア:

[(1, 21281697), (3, 7093899), (9, 2364633), (27, 788211), (37, 575181), (81, 262737), (111, 191727), (243, 87579), (263, 80919), (333, 63909), (729, 29193), (789, 26973), (999, 21303), (2187, 9731), (2367, 8991), (2997, 7101)]