21687856

素因数分解:

$2^4\times {\mathrm{269}}^1\times {\mathrm{5039}}^1$

素因数の和:5316

約数の個数: 20

約数和(自身を含む): 42184800

約数和(自身を除く): 20496944

約数列:

[1, 2, 4, 8, 16, 269, 538, 1076, 2152, 4304, 5039, 10078, 20156, 40312, 80624, 1355491, 2710982, 5421964, 10843928, 21687856]

約数ペア:

[(1, 21687856), (2, 10843928), (4, 5421964), (8, 2710982), (16, 1355491), (269, 80624), (538, 40312), (1076, 20156), (2152, 10078), (4304, 5039)]