216821.0000000

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{313}}^1$

素因数の和:385

約数の個数: 24

約数和(自身を含む): 4310592

約数和(自身を除く): 1524579

約数列:

[1, 3, 9, 23, 43, 69, 129, 207, 313, 387, 939, 989, 2817, 2967, 7199, 8901, 13459, 21597, 40377, 64791, 121131, 309557, 928671, 2786013]

約数ペア:

[(1, 2786013), (3, 928671), (9, 309557), (23, 121131), (43, 64791), (69, 40377), (129, 21597), (207, 13459), (313, 8901), (387, 7199), (939, 2967), (989, 2817)]