21997965

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{133321}}^1$

素因数の和:133340

約数の個数: 16

約数和(自身を含む): 38396736

約数和(自身を除く): 16398771

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 133321, 399963, 666605, 1466531, 1999815, 4399593, 7332655, 21997965]

約数ペア:

[(1, 21997965), (3, 7332655), (5, 4399593), (11, 1999815), (15, 1466531), (33, 666605), (55, 399963), (165, 133321)]