20912000

素因数分解:

$2^7\times 5^3\times {\mathrm{1307}}^1$

素因数の和:1336

約数の個数: 64

約数和(自身を含む): 52032240

約数和(自身を除く): 31120240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 128, 160, 200, 250, 320, 400, 500, 640, 800, 1000, 1307, 1600, 2000, 2614, 3200, 4000, 5228, 6535, 8000, 10456, 13070, 16000, 20912, 26140, 32675, 41824, 52280, 65350, 83648, 104560, 130700, 163375, 167296, 209120, 261400, 326750, 418240, 522800, 653500, 836480, 1045600, 1307000, 2091200, 2614000, 4182400, 5228000, 10456000, 20912000]

約数ペア:

[(1, 20912000), (2, 10456000), (4, 5228000), (5, 4182400), (8, 2614000), (10, 2091200), (16, 1307000), (20, 1045600), (25, 836480), (32, 653500), (40, 522800), (50, 418240), (64, 326750), (80, 261400), (100, 209120), (125, 167296), (128, 163375), (160, 130700), (200, 104560), (250, 83648), (320, 65350), (400, 52280), (500, 41824), (640, 32675), (800, 26140), (1000, 20912), (1307, 16000), (1600, 13070), (2000, 10456), (2614, 8000), (3200, 6535), (4000, 5228)]