21095811

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{409}}^1\times {\mathrm{521}}^1$

素因数の和:947

約数の個数: 24

約数和(自身を含む): 33387120

約数和(自身を除く): 12291309

約数列:

[1, 3, 9, 11, 33, 99, 409, 521, 1227, 1563, 3681, 4499, 4689, 5731, 13497, 17193, 40491, 51579, 213089, 639267, 1917801, 2343979, 7031937, 21095811]

約数ペア:

[(1, 21095811), (3, 7031937), (9, 2343979), (11, 1917801), (33, 639267), (99, 213089), (409, 51579), (521, 40491), (1227, 17193), (1563, 13497), (3681, 5731), (4499, 4689)]