21731865

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{85223}}^1$

素因数の和:85248

約数の個数: 16

約数和(自身を含む): 36816768

約数和(自身を除く): 15084903

約数列:

[1, 3, 5, 15, 17, 51, 85, 255, 85223, 255669, 426115, 1278345, 1448791, 4346373, 7243955, 21731865]

約数ペア:

[(1, 21731865), (3, 7243955), (5, 4346373), (15, 1448791), (17, 1278345), (51, 426115), (85, 255669), (255, 85223)]