21368455

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{1549}}^1$

素因数の和:1674

約数の個数: 16

約数和(自身を含む): 26784000

約数和(自身を除く): 5415545

約数列:

[1, 5, 31, 89, 155, 445, 1549, 2759, 7745, 13795, 48019, 137861, 240095, 689305, 4273691, 21368455]

約数ペア:

[(1, 21368455), (5, 4273691), (31, 689305), (89, 240095), (155, 137861), (445, 48019), (1549, 13795), (2759, 7745)]