19784000

素因数分解:

$2^6\times 5^3\times {\mathrm{2473}}^1$

素因数の和:2500

約数の個数: 56

約数和(自身を含む): 49014888

約数和(自身を除く): 29230888

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 160, 200, 250, 320, 400, 500, 800, 1000, 1600, 2000, 2473, 4000, 4946, 8000, 9892, 12365, 19784, 24730, 39568, 49460, 61825, 79136, 98920, 123650, 158272, 197840, 247300, 309125, 395680, 494600, 618250, 791360, 989200, 1236500, 1978400, 2473000, 3956800, 4946000, 9892000, 19784000]

約数ペア:

[(1, 19784000), (2, 9892000), (4, 4946000), (5, 3956800), (8, 2473000), (10, 1978400), (16, 1236500), (20, 989200), (25, 791360), (32, 618250), (40, 494600), (50, 395680), (64, 309125), (80, 247300), (100, 197840), (125, 158272), (160, 123650), (200, 98920), (250, 79136), (320, 61825), (400, 49460), (500, 39568), (800, 24730), (1000, 19784), (1600, 12365), (2000, 9892), (2473, 8000), (4000, 4946)]