21016821

素因数分解:

$3^1\times 7^1\times {\mathrm{277}}^1\times {\mathrm{3613}}^1$

素因数の和:3900

約数の個数: 16

約数和(自身を含む): 32150144

約数和(自身を除く): 11133323

約数列:

[1, 3, 7, 21, 277, 831, 1939, 3613, 5817, 10839, 25291, 75873, 1000801, 3002403, 7005607, 21016821]

約数ペア:

[(1, 21016821), (3, 7005607), (7, 3002403), (21, 1000801), (277, 75873), (831, 25291), (1939, 10839), (3613, 5817)]