21685797

素因数分解:

$3^2\times 7^1\times {\mathrm{107}}^1\times {\mathrm{3217}}^1$

素因数の和:3337

約数の個数: 24

約数和(自身を含む): 36144576

約数和(自身を除く): 14458779

約数列:

[1, 3, 7, 9, 21, 63, 107, 321, 749, 963, 2247, 3217, 6741, 9651, 22519, 28953, 67557, 202671, 344219, 1032657, 2409533, 3097971, 7228599, 21685797]

約数ペア:

[(1, 21685797), (3, 7228599), (7, 3097971), (9, 2409533), (21, 1032657), (63, 344219), (107, 202671), (321, 67557), (749, 28953), (963, 22519), (2247, 9651), (3217, 6741)]