20665000

素因数分解:

$2^3\times 5^4\times {\mathrm{4133}}^1$

素因数の和:4159

約数の個数: 40

約数和(自身を含む): 48429810

約数和(自身を除く): 27764810

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 625, 1000, 1250, 2500, 4133, 5000, 8266, 16532, 20665, 33064, 41330, 82660, 103325, 165320, 206650, 413300, 516625, 826600, 1033250, 2066500, 2583125, 4133000, 5166250, 10332500, 20665000]

約数ペア:

[(1, 20665000), (2, 10332500), (4, 5166250), (5, 4133000), (8, 2583125), (10, 2066500), (20, 1033250), (25, 826600), (40, 516625), (50, 413300), (100, 206650), (125, 165320), (200, 103325), (250, 82660), (500, 41330), (625, 33064), (1000, 20665), (1250, 16532), (2500, 8266), (4133, 5000)]