20720025

素因数分解:

$3^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{5417}}^1$

素因数の和:5450

約数の個数: 36

約数和(自身を含む): 39302172

約数和(自身を除く): 18582147

約数列:

[1, 3, 5, 9, 15, 17, 25, 45, 51, 75, 85, 153, 225, 255, 425, 765, 1275, 3825, 5417, 16251, 27085, 48753, 81255, 92089, 135425, 243765, 276267, 406275, 460445, 828801, 1218825, 1381335, 2302225, 4144005, 6906675, 20720025]

約数ペア:

[(1, 20720025), (3, 6906675), (5, 4144005), (9, 2302225), (15, 1381335), (17, 1218825), (25, 828801), (45, 460445), (51, 406275), (75, 276267), (85, 243765), (153, 135425), (225, 92089), (255, 81255), (425, 48753), (765, 27085), (1275, 16251), (3825, 5417)]