21090255

素因数分解:

$3^1\times 5^1\times {\mathrm{127}}^1\times {\mathrm{11071}}^1$

素因数の和:11206

約数の個数: 16

約数和(自身を含む): 34013184

約数和(自身を除く): 12922929

約数列:

[1, 3, 5, 15, 127, 381, 635, 1905, 11071, 33213, 55355, 166065, 1406017, 4218051, 7030085, 21090255]

約数ペア:

[(1, 21090255), (3, 7030085), (5, 4218051), (15, 1406017), (127, 166065), (381, 55355), (635, 33213), (1905, 11071)]