218391639

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{197}}^1\times {\mathrm{21737}}^1$

素因数の和:21954

約数の個数: 16

約数和(自身を含む): 309896928

約数和(自身を除く): 91505289

約数列:

[1, 3, 17, 51, 197, 591, 3349, 10047, 21737, 65211, 369529, 1108587, 4282189, 12846567, 72797213, 218391639]

約数ペア:

[(1, 218391639), (3, 72797213), (17, 12846567), (51, 4282189), (197, 1108587), (591, 369529), (3349, 65211), (10047, 21737)]