21059757

素因数分解:

$3^4\times {\mathrm{31}}^1\times {\mathrm{8387}}^1$

素因数の和:8430

約数の個数: 20

約数和(自身を含む): 32478336

約数和(自身を除く): 11418579

約数列:

[1, 3, 9, 27, 31, 81, 93, 279, 837, 2511, 8387, 25161, 75483, 226449, 259997, 679347, 779991, 2339973, 7019919, 21059757]

約数ペア:

[(1, 21059757), (3, 7019919), (9, 2339973), (27, 779991), (31, 679347), (81, 259997), (93, 226449), (279, 75483), (837, 25161), (2511, 8387)]