21872020

素因数分解:

$2^2\times 5^1\times {\mathrm{457}}^1\times {\mathrm{2393}}^1$

素因数の和:2859

約数の個数: 24

約数和(自身を含む): 46050984

約数和(自身を除く): 24178964

約数列:

[1, 2, 4, 5, 10, 20, 457, 914, 1828, 2285, 2393, 4570, 4786, 9140, 9572, 11965, 23930, 47860, 1093601, 2187202, 4374404, 5468005, 10936010, 21872020]

約数ペア:

[(1, 21872020), (2, 10936010), (4, 5468005), (5, 4374404), (10, 2187202), (20, 1093601), (457, 47860), (914, 23930), (1828, 11965), (2285, 9572), (2393, 9140), (4570, 4786)]