21078740

素因数分解:

$2^2\times 5^1\times {\mathrm{167}}^1\times {\mathrm{6311}}^1$

素因数の和:6487

約数の個数: 24

約数和(自身を含む): 44537472

約数和(自身を除く): 23458732

約数列:

[1, 2, 4, 5, 10, 20, 167, 334, 668, 835, 1670, 3340, 6311, 12622, 25244, 31555, 63110, 126220, 1053937, 2107874, 4215748, 5269685, 10539370, 21078740]

約数ペア:

[(1, 21078740), (2, 10539370), (4, 5269685), (5, 4215748), (10, 2107874), (20, 1053937), (167, 126220), (334, 63110), (668, 31555), (835, 25244), (1670, 12622), (3340, 6311)]