21007965

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{127321}}^1$

素因数の和:127340

約数の個数: 16

約数和(自身を含む): 36668736

約数和(自身を除く): 15660771

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 127321, 381963, 636605, 1400531, 1909815, 4201593, 7002655, 21007965]

約数ペア:

[(1, 21007965), (3, 7002655), (5, 4201593), (11, 1909815), (15, 1400531), (33, 636605), (55, 381963), (165, 127321)]