21778551

素因数分解:

$3^4\times {\mathrm{67}}^1\times {\mathrm{4013}}^1$

素因数の和:4092

約数の個数: 20

約数和(自身を含む): 33027192

約数和(自身を除く): 11248641

約数列:

[1, 3, 9, 27, 67, 81, 201, 603, 1809, 4013, 5427, 12039, 36117, 108351, 268871, 325053, 806613, 2419839, 7259517, 21778551]

約数ペア:

[(1, 21778551), (3, 7259517), (9, 2419839), (27, 806613), (67, 325053), (81, 268871), (201, 108351), (603, 36117), (1809, 12039), (4013, 5427)]