21356800

素因数分解:

$2^8\times 5^2\times {\mathrm{47}}^1\times {\mathrm{71}}^1$

素因数の和:144

約数の個数: 108

約数和(自身を含む): 54746496

約数和(自身を除く): 33389696

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 47, 50, 64, 71, 80, 94, 100, 128, 142, 160, 188, 200, 235, 256, 284, 320, 355, 376, 400, 470, 568, 640, 710, 752, 800, 940, 1136, 1175, 1280, 1420, 1504, 1600, 1775, 1880, 2272, 2350, 2840, 3008, 3200, 3337, 3550, 3760, 4544, 4700, 5680, 6016, 6400, 6674, 7100, 7520, 9088, 9400, 11360, 12032, 13348, 14200, 15040, 16685, 18176, 18800, 22720, 26696, 28400, 30080, 33370, 37600, 45440, 53392, 56800, 60160, 66740, 75200, 83425, 90880, 106784, 113600, 133480, 150400, 166850, 213568, 227200, 266960, 300800, 333700, 427136, 454400, 533920, 667400, 854272, 1067840, 1334800, 2135680, 2669600, 4271360, 5339200, 10678400, 21356800]

約数ペア:

[(1, 21356800), (2, 10678400), (4, 5339200), (5, 4271360), (8, 2669600), (10, 2135680), (16, 1334800), (20, 1067840), (25, 854272), (32, 667400), (40, 533920), (47, 454400), (50, 427136), (64, 333700), (71, 300800), (80, 266960), (94, 227200), (100, 213568), (128, 166850), (142, 150400), (160, 133480), (188, 113600), (200, 106784), (235, 90880), (256, 83425), (284, 75200), (320, 66740), (355, 60160), (376, 56800), (400, 53392), (470, 45440), (568, 37600), (640, 33370), (710, 30080), (752, 28400), (800, 26696), (940, 22720), (1136, 18800), (1175, 18176), (1280, 16685), (1420, 15040), (1504, 14200), (1600, 13348), (1775, 12032), (1880, 11360), (2272, 9400), (2350, 9088), (2840, 7520), (3008, 7100), (3200, 6674), (3337, 6400), (3550, 6016), (3760, 5680), (4544, 4700)]