20648115

素因数分解:

$3^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{2999}}^1$

素因数の和:3033

約数の個数: 40

約数和(自身を含む): 39204000

約数和(自身を除く): 18555885

約数列:

[1, 3, 5, 9, 15, 17, 27, 45, 51, 81, 85, 135, 153, 255, 405, 459, 765, 1377, 2295, 2999, 6885, 8997, 14995, 26991, 44985, 50983, 80973, 134955, 152949, 242919, 254915, 404865, 458847, 764745, 1214595, 1376541, 2294235, 4129623, 6882705, 20648115]

約数ペア:

[(1, 20648115), (3, 6882705), (5, 4129623), (9, 2294235), (15, 1376541), (17, 1214595), (27, 764745), (45, 458847), (51, 404865), (81, 254915), (85, 242919), (135, 152949), (153, 134955), (255, 80973), (405, 50983), (459, 44985), (765, 26991), (1377, 14995), (2295, 8997), (2999, 6885)]