28161021

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{163}}^1\times {\mathrm{433}}^1$

素因数の和:625

約数の個数: 32

約数和(自身を含む): 45552640

約数和(自身を除く): 17391619

約数列:

[1, 3, 7, 19, 21, 57, 133, 163, 399, 433, 489, 1141, 1299, 3031, 3097, 3423, 8227, 9093, 9291, 21679, 24681, 57589, 65037, 70579, 172767, 211737, 494053, 1341001, 1482159, 4023003, 9387007, 28161021]

約数ペア:

[(1, 28161021), (3, 9387007), (7, 4023003), (19, 1482159), (21, 1341001), (57, 494053), (133, 211737), (163, 172767), (399, 70579), (433, 65037), (489, 57589), (1141, 24681), (1299, 21679), (3031, 9291), (3097, 9093), (3423, 8227)]