20704000

素因数分解:

$2^8\times 5^3\times {\mathrm{647}}^1$

素因数の和:678

約数の個数: 72

約数和(自身を含む): 51655968

約数和(自身を除く): 30951968

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 128, 160, 200, 250, 256, 320, 400, 500, 640, 647, 800, 1000, 1280, 1294, 1600, 2000, 2588, 3200, 3235, 4000, 5176, 6400, 6470, 8000, 10352, 12940, 16000, 16175, 20704, 25880, 32000, 32350, 41408, 51760, 64700, 80875, 82816, 103520, 129400, 161750, 165632, 207040, 258800, 323500, 414080, 517600, 647000, 828160, 1035200, 1294000, 2070400, 2588000, 4140800, 5176000, 10352000, 20704000]

約数ペア:

[(1, 20704000), (2, 10352000), (4, 5176000), (5, 4140800), (8, 2588000), (10, 2070400), (16, 1294000), (20, 1035200), (25, 828160), (32, 647000), (40, 517600), (50, 414080), (64, 323500), (80, 258800), (100, 207040), (125, 165632), (128, 161750), (160, 129400), (200, 103520), (250, 82816), (256, 80875), (320, 64700), (400, 51760), (500, 41408), (640, 32350), (647, 32000), (800, 25880), (1000, 20704), (1280, 16175), (1294, 16000), (1600, 12940), (2000, 10352), (2588, 8000), (3200, 6470), (3235, 6400), (4000, 5176)]