21107565

素因数分解:

$3^2\times 5^1\times {\mathrm{197}}^1\times {\mathrm{2381}}^1$

素因数の和:2589

約数の個数: 24

約数和(自身を含む): 36787608

約数和(自身を除く): 15680043

約数列:

[1, 3, 5, 9, 15, 45, 197, 591, 985, 1773, 2381, 2955, 7143, 8865, 11905, 21429, 35715, 107145, 469057, 1407171, 2345285, 4221513, 7035855, 21107565]

約数ペア:

[(1, 21107565), (3, 7035855), (5, 4221513), (9, 2345285), (15, 1407171), (45, 469057), (197, 107145), (591, 35715), (985, 21429), (1773, 11905), (2381, 8865), (2955, 7143)]