21806919

素因数分解:

$3^2\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{1663}}^1$

素因数の和:1747

約数の個数: 24

約数和(自身を含む): 33226752

約数和(自身を除く): 11419833

約数列:

[1, 3, 9, 31, 47, 93, 141, 279, 423, 1457, 1663, 4371, 4989, 13113, 14967, 51553, 78161, 154659, 234483, 463977, 703449, 2422991, 7268973, 21806919]

約数ペア:

[(1, 21806919), (3, 7268973), (9, 2422991), (31, 703449), (47, 463977), (93, 234483), (141, 154659), (279, 78161), (423, 51553), (1457, 14967), (1663, 13113), (4371, 4989)]