21421465

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{10631}}^1$

素因数の和:10680

約数の個数: 16

約数和(自身を含む): 28578816

約数和(自身を除く): 7157351

約数列:

[1, 5, 13, 31, 65, 155, 403, 2015, 10631, 53155, 138203, 329561, 691015, 1647805, 4284293, 21421465]

約数ペア:

[(1, 21421465), (5, 4284293), (13, 1647805), (31, 691015), (65, 329561), (155, 138203), (403, 53155), (2015, 10631)]