21239379

素因数分解:

$3^2\times 7^1\times {\mathrm{53}}^1\times {\mathrm{6361}}^1$

素因数の和:6427

約数の個数: 24

約数和(自身を含む): 35728992

約数和(自身を除く): 14489613

約数列:

[1, 3, 7, 9, 21, 53, 63, 159, 371, 477, 1113, 3339, 6361, 19083, 44527, 57249, 133581, 337133, 400743, 1011399, 2359931, 3034197, 7079793, 21239379]

約数ペア:

[(1, 21239379), (3, 7079793), (7, 3034197), (9, 2359931), (21, 1011399), (53, 400743), (63, 337133), (159, 133581), (371, 57249), (477, 44527), (1113, 19083), (3339, 6361)]