20649291280

素因数分解:

$2^4\times 5^1\times {\mathrm{1051}}^1\times {\mathrm{245591}}^1$

素因数の和:246655

約数の個数: 40

約数和(自身を含む): 48055477824

約数和(自身を除く): 27406186544

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1051, 2102, 4204, 5255, 8408, 10510, 16816, 21020, 42040, 84080, 245591, 491182, 982364, 1227955, 1964728, 2455910, 3929456, 4911820, 9823640, 19647280, 258116141, 516232282, 1032464564, 1290580705, 2064929128, 2581161410, 4129858256, 5162322820, 10324645640, 20649291280]

約数ペア:

[(1, 20649291280), (2, 10324645640), (4, 5162322820), (5, 4129858256), (8, 2581161410), (10, 2064929128), (16, 1290580705), (20, 1032464564), (40, 516232282), (80, 258116141), (1051, 19647280), (2102, 9823640), (4204, 4911820), (5255, 3929456), (8408, 2455910), (10510, 1964728), (16816, 1227955), (21020, 982364), (42040, 491182), (84080, 245591)]