21203505

素因数分解:

$3^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{9239}}^1$

素因数の和:9270

約数の個数: 32

約数和(自身を含む): 39916800

約数和(自身を除く): 18713295

約数列:

[1, 3, 5, 9, 15, 17, 27, 45, 51, 85, 135, 153, 255, 459, 765, 2295, 9239, 27717, 46195, 83151, 138585, 157063, 249453, 415755, 471189, 785315, 1247265, 1413567, 2355945, 4240701, 7067835, 21203505]

約数ペア:

[(1, 21203505), (3, 7067835), (5, 4240701), (9, 2355945), (15, 1413567), (17, 1247265), (27, 785315), (45, 471189), (51, 415755), (85, 249453), (135, 157063), (153, 138585), (255, 83151), (459, 46195), (765, 27717), (2295, 9239)]