21378771

素因数分解:

$3^2\times {\mathrm{29}}^1\times {\mathrm{101}}^1\times {\mathrm{811}}^1$

素因数の和:947

約数の個数: 24

約数和(自身を含む): 32301360

約数和(自身を除く): 10922589

約数列:

[1, 3, 9, 29, 87, 101, 261, 303, 811, 909, 2433, 2929, 7299, 8787, 23519, 26361, 70557, 81911, 211671, 245733, 737199, 2375419, 7126257, 21378771]

約数ペア:

[(1, 21378771), (3, 7126257), (9, 2375419), (29, 737199), (87, 245733), (101, 211671), (261, 81911), (303, 70557), (811, 26361), (909, 23519), (2433, 8787), (2929, 7299)]