21478795

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{491}}^1\times {\mathrm{673}}^1$

素因数の和:1182

約数の個数: 16

約数和(自身を含む): 27855072

約数和(自身を除く): 6376277

約数列:

[1, 5, 13, 65, 491, 673, 2455, 3365, 6383, 8749, 31915, 43745, 330443, 1652215, 4295759, 21478795]

約数ペア:

[(1, 21478795), (5, 4295759), (13, 1652215), (65, 330443), (491, 43745), (673, 31915), (2455, 8749), (3365, 6383)]