21776481

素因数分解:

$3^2\times {\mathrm{53}}^1\times {\mathrm{71}}^1\times {\mathrm{643}}^1$

素因数の和:773

約数の個数: 24

約数和(自身を含む): 32550336

約数和(自身を除く): 10773855

約数列:

[1, 3, 9, 53, 71, 159, 213, 477, 639, 643, 1929, 3763, 5787, 11289, 33867, 34079, 45653, 102237, 136959, 306711, 410877, 2419609, 7258827, 21776481]

約数ペア:

[(1, 21776481), (3, 7258827), (9, 2419609), (53, 410877), (71, 306711), (159, 136959), (213, 102237), (477, 45653), (639, 34079), (643, 33867), (1929, 11289), (3763, 5787)]