20690445

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{1979}}^1$

素因数の和:2045

約数の個数: 32

約数和(自身を含む): 35925120

約数和(自身を除く): 15234675

約数列:

[1, 3, 5, 15, 17, 41, 51, 85, 123, 205, 255, 615, 697, 1979, 2091, 3485, 5937, 9895, 10455, 29685, 33643, 81139, 100929, 168215, 243417, 405695, 504645, 1217085, 1379363, 4138089, 6896815, 20690445]

約数ペア:

[(1, 20690445), (3, 6896815), (5, 4138089), (15, 1379363), (17, 1217085), (41, 504645), (51, 405695), (85, 243417), (123, 168215), (205, 100929), (255, 81139), (615, 33643), (697, 29685), (1979, 10455), (2091, 9895), (3485, 5937)]