21128836

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{173}}^1\times {\mathrm{1607}}^1$

素因数の和:1803

約数の個数: 24

約数和(自身を含む): 39170880

約数和(自身を除く): 18042044

約数列:

[1, 2, 4, 19, 38, 76, 173, 346, 692, 1607, 3214, 3287, 6428, 6574, 13148, 30533, 61066, 122132, 278011, 556022, 1112044, 5282209, 10564418, 21128836]

約数ペア:

[(1, 21128836), (2, 10564418), (4, 5282209), (19, 1112044), (38, 556022), (76, 278011), (173, 122132), (346, 61066), (692, 30533), (1607, 13148), (3214, 6574), (3287, 6428)]