21051081

素因数分解:

$3^2\times {\mathrm{41}}^1\times {\mathrm{89}}^1\times {\mathrm{641}}^1$

素因数の和:777

約数の個数: 24

約数和(自身を含む): 31547880

約数和(自身を除く): 10496799

約数列:

[1, 3, 9, 41, 89, 123, 267, 369, 641, 801, 1923, 3649, 5769, 10947, 26281, 32841, 57049, 78843, 171147, 236529, 513441, 2339009, 7017027, 21051081]

約数ペア:

[(1, 21051081), (3, 7017027), (9, 2339009), (41, 513441), (89, 236529), (123, 171147), (267, 78843), (369, 57049), (641, 32841), (801, 26281), (1923, 10947), (3649, 5769)]