21198261

素因数分解:

$3^1\times 7^1\times {\mathrm{607}}^1\times {\mathrm{1663}}^1$

素因数の和:2280

約数の個数: 16

約数和(自身を含む): 32374784

約数和(自身を除く): 11176523

約数列:

[1, 3, 7, 21, 607, 1663, 1821, 4249, 4989, 11641, 12747, 34923, 1009441, 3028323, 7066087, 21198261]

約数ペア:

[(1, 21198261), (3, 7066087), (7, 3028323), (21, 1009441), (607, 34923), (1663, 12747), (1821, 11641), (4249, 4989)]