21905469

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{4937}}^1$

素因数の和:4989

約数の個数: 24

約数和(自身を含む): 34664760

約数和(自身を除く): 12759291

約数列:

[1, 3, 9, 17, 29, 51, 87, 153, 261, 493, 1479, 4437, 4937, 14811, 44433, 83929, 143173, 251787, 429519, 755361, 1288557, 2433941, 7301823, 21905469]

約数ペア:

[(1, 21905469), (3, 7301823), (9, 2433941), (17, 1288557), (29, 755361), (51, 429519), (87, 251787), (153, 143173), (261, 83929), (493, 44433), (1479, 14811), (4437, 4937)]