21981399

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{28961}}^1$

素因数の和:28998

約数の個数: 16

約数和(自身を含む): 33364224

約数和(自身を除く): 11382825

約数列:

[1, 3, 11, 23, 33, 69, 253, 759, 28961, 86883, 318571, 666103, 955713, 1998309, 7327133, 21981399]

約数ペア:

[(1, 21981399), (3, 7327133), (11, 1998309), (23, 955713), (33, 666103), (69, 318571), (253, 86883), (759, 28961)]