21890165

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{523}}^1\times {\mathrm{761}}^1$

素因数の和:1300

約数の個数: 16

約数和(自身を含む): 28748736

約数和(自身を除く): 6858571

約数列:

[1, 5, 11, 55, 523, 761, 2615, 3805, 5753, 8371, 28765, 41855, 398003, 1990015, 4378033, 21890165]

約数ペア:

[(1, 21890165), (5, 4378033), (11, 1990015), (55, 398003), (523, 41855), (761, 28765), (2615, 8371), (3805, 5753)]