21287871

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{2129}}^1$

素因数の和:2247

約数の個数: 24

約数和(自身を含む): 33892560

約数和(自身を除く): 12604689

約数列:

[1, 3, 9, 11, 33, 99, 101, 303, 909, 1111, 2129, 3333, 6387, 9999, 19161, 23419, 70257, 210771, 215029, 645087, 1935261, 2365319, 7095957, 21287871]

約数ペア:

[(1, 21287871), (3, 7095957), (9, 2365319), (11, 1935261), (33, 645087), (99, 215029), (101, 210771), (303, 70257), (909, 23419), (1111, 19161), (2129, 9999), (3333, 6387)]