21609704

素因数分解:

$2^3\times {\mathrm{541}}^1\times {\mathrm{4993}}^1$

素因数の和:5540

約数の個数: 16

約数和(自身を含む): 40601220

約数和(自身を除く): 18991516

約数列:

[1, 2, 4, 8, 541, 1082, 2164, 4328, 4993, 9986, 19972, 39944, 2701213, 5402426, 10804852, 21609704]

約数ペア:

[(1, 21609704), (2, 10804852), (4, 5402426), (8, 2701213), (541, 39944), (1082, 19972), (2164, 9986), (4328, 4993)]