21377245

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{5351}}^1$

素因数の和:5420

約数の個数: 16

約数和(自身を含む): 27744768

約数和(自身を除く): 6367523

約数列:

[1, 5, 17, 47, 85, 235, 799, 3995, 5351, 26755, 90967, 251497, 454835, 1257485, 4275449, 21377245]

約数ペア:

[(1, 21377245), (5, 4275449), (17, 1257485), (47, 454835), (85, 251497), (235, 90967), (799, 26755), (3995, 5351)]