21788753

素因数分解:

$7^1\times {\mathrm{31}}^2\times {\mathrm{41}}^1\times {\mathrm{79}}^1$

素因数の和:189

約数の個数: 24

約数和(自身を含む): 26691840

約数和(自身を除く): 4903087

約数列:

[1, 7, 31, 41, 79, 217, 287, 553, 961, 1271, 2449, 3239, 6727, 8897, 17143, 22673, 39401, 75919, 100409, 275807, 531433, 702863, 3112679, 21788753]

約数ペア:

[(1, 21788753), (7, 3112679), (31, 702863), (41, 531433), (79, 275807), (217, 100409), (287, 75919), (553, 39401), (961, 22673), (1271, 17143), (2449, 8897), (3239, 6727)]