20641815

素因数分解:

$3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{14797}}^1$

素因数の和:14839

約数の個数: 24

約数和(自身を含む): 36935808

約数和(自身を除く): 16293993

約数列:

[1, 3, 5, 9, 15, 31, 45, 93, 155, 279, 465, 1395, 14797, 44391, 73985, 133173, 221955, 458707, 665865, 1376121, 2293535, 4128363, 6880605, 20641815]

約数ペア:

[(1, 20641815), (3, 6880605), (5, 4128363), (9, 2293535), (15, 1376121), (31, 665865), (45, 458707), (93, 221955), (155, 133173), (279, 73985), (465, 44391), (1395, 14797)]