20530000

素因数分解:

$2^4\times 5^4\times {\mathrm{2053}}^1$

素因数の和:2081

約数の個数: 50

約数和(自身を含む): 49729394

約数和(自身を除く): 29199394

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 625, 1000, 1250, 2000, 2053, 2500, 4106, 5000, 8212, 10000, 10265, 16424, 20530, 32848, 41060, 51325, 82120, 102650, 164240, 205300, 256625, 410600, 513250, 821200, 1026500, 1283125, 2053000, 2566250, 4106000, 5132500, 10265000, 20530000]

約数ペア:

[(1, 20530000), (2, 10265000), (4, 5132500), (5, 4106000), (8, 2566250), (10, 2053000), (16, 1283125), (20, 1026500), (25, 821200), (40, 513250), (50, 410600), (80, 256625), (100, 205300), (125, 164240), (200, 102650), (250, 82120), (400, 51325), (500, 41060), (625, 32848), (1000, 20530), (1250, 16424), (2000, 10265), (2053, 10000), (2500, 8212), (4106, 5000)]