18891215

素因数分解:

$5^1\times 7^2\times {\mathrm{83}}^1\times {\mathrm{929}}^1$

素因数の和:1031

約数の個数: 24

約数和(自身を含む): 26717040

約数和(自身を除く): 7825825

約数列:

[1, 5, 7, 35, 49, 83, 245, 415, 581, 929, 2905, 4067, 4645, 6503, 20335, 32515, 45521, 77107, 227605, 385535, 539749, 2698745, 3778243, 18891215]

約数ペア:

[(1, 18891215), (5, 3778243), (7, 2698745), (35, 539749), (49, 385535), (83, 227605), (245, 77107), (415, 45521), (581, 32515), (929, 20335), (2905, 6503), (4067, 4645)]