21091473

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{2539}}^1$

素因数の和:2629

約数の個数: 24

約数和(自身を含む): 33284160

約数和(自身を除く): 12192687

約数列:

[1, 3, 9, 13, 39, 71, 117, 213, 639, 923, 2539, 2769, 7617, 8307, 22851, 33007, 99021, 180269, 297063, 540807, 1622421, 2343497, 7030491, 21091473]

約数ペア:

[(1, 21091473), (3, 7030491), (9, 2343497), (13, 1622421), (39, 540807), (71, 297063), (117, 180269), (213, 99021), (639, 33007), (923, 22851), (2539, 8307), (2769, 7617)]