21384575

素因数分解:

$5^2\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{673}}^1$

素因数の和:755

約数の個数: 24

約数和(自身を含む): 28081536

約数和(自身を除く): 6696961

約数列:

[1, 5, 25, 31, 41, 155, 205, 673, 775, 1025, 1271, 3365, 6355, 16825, 20863, 27593, 31775, 104315, 137965, 521575, 689825, 855383, 4276915, 21384575]

約数ペア:

[(1, 21384575), (5, 4276915), (25, 855383), (31, 689825), (41, 521575), (155, 137965), (205, 104315), (673, 31775), (775, 27593), (1025, 20863), (1271, 16825), (3365, 6355)]