21207219

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{27941}}^1$

素因数の和:27978

約数の個数: 16

約数和(自身を含む): 32189184

約数和(自身を除く): 10981965

約数列:

[1, 3, 11, 23, 33, 69, 253, 759, 27941, 83823, 307351, 642643, 922053, 1927929, 7069073, 21207219]

約数ペア:

[(1, 21207219), (3, 7069073), (11, 1927929), (23, 922053), (33, 642643), (69, 307351), (253, 83823), (759, 27941)]