21280855

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{13177}}^1$

素因数の和:13218

約数の個数: 16

約数和(自身を含む): 28464480

約数和(自身を除く): 7183625

約数列:

[1, 5, 17, 19, 85, 95, 323, 1615, 13177, 65885, 224009, 250363, 1120045, 1251815, 4256171, 21280855]

約数ペア:

[(1, 21280855), (5, 4256171), (17, 1251815), (19, 1120045), (85, 250363), (95, 224009), (323, 65885), (1615, 13177)]