21285065

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{2591}}^1$

素因数の和:2680

約数の個数: 16

約数和(自身を含む): 26873856

約数和(自身を除く): 5588791

約数列:

[1, 5, 31, 53, 155, 265, 1643, 2591, 8215, 12955, 80321, 137323, 401605, 686615, 4257013, 21285065]

約数ペア:

[(1, 21285065), (5, 4257013), (31, 686615), (53, 401605), (155, 137323), (265, 80321), (1643, 12955), (2591, 8215)]