20645055

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{26987}}^1$

素因数の和:27015

約数の個数: 24

約数和(自身を含む): 37891152

約数和(自身を除く): 17246097

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 765, 26987, 80961, 134935, 242883, 404805, 458779, 1214415, 1376337, 2293895, 4129011, 6881685, 20645055]

約数ペア:

[(1, 20645055), (3, 6881685), (5, 4129011), (9, 2293895), (15, 1376337), (17, 1214415), (45, 458779), (51, 404805), (85, 242883), (153, 134935), (255, 80961), (765, 26987)]