20666475

素因数分解:

$3^3\times 5^2\times {\mathrm{17}}^1\times {\mathrm{1801}}^1$

素因数の和:1837

約数の個数: 48

約数和(自身を含む): 40220640

約数和(自身を除く): 19554165

約数列:

[1, 3, 5, 9, 15, 17, 25, 27, 45, 51, 75, 85, 135, 153, 225, 255, 425, 459, 675, 765, 1275, 1801, 2295, 3825, 5403, 9005, 11475, 16209, 27015, 30617, 45025, 48627, 81045, 91851, 135075, 153085, 243135, 275553, 405225, 459255, 765425, 826659, 1215675, 1377765, 2296275, 4133295, 6888825, 20666475]

約数ペア:

[(1, 20666475), (3, 6888825), (5, 4133295), (9, 2296275), (15, 1377765), (17, 1215675), (25, 826659), (27, 765425), (45, 459255), (51, 405225), (75, 275553), (85, 243135), (135, 153085), (153, 135075), (225, 91851), (255, 81045), (425, 48627), (459, 45025), (675, 30617), (765, 27015), (1275, 16209), (1801, 11475), (2295, 9005), (3825, 5403)]