21489616

素因数分解:

$2^4\times {\mathrm{251}}^1\times {\mathrm{5351}}^1$

素因数の和:5610

約数の個数: 20

約数和(自身を含む): 41809824

約数和(自身を除く): 20320208

約数列:

[1, 2, 4, 8, 16, 251, 502, 1004, 2008, 4016, 5351, 10702, 21404, 42808, 85616, 1343101, 2686202, 5372404, 10744808, 21489616]

約数ペア:

[(1, 21489616), (2, 10744808), (4, 5372404), (8, 2686202), (16, 1343101), (251, 85616), (502, 42808), (1004, 21404), (2008, 10702), (4016, 5351)]