20499520

素因数分解:

$2^6\times 5^1\times {\mathrm{29}}^1\times {\mathrm{47}}^2$

素因数の和:140

約数の個数: 84

約数和(自身を含む): 51595020

約数和(自身を除く): 31095500

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 32, 40, 47, 58, 64, 80, 94, 116, 145, 160, 188, 232, 235, 290, 320, 376, 464, 470, 580, 752, 928, 940, 1160, 1363, 1504, 1856, 1880, 2209, 2320, 2726, 3008, 3760, 4418, 4640, 5452, 6815, 7520, 8836, 9280, 10904, 11045, 13630, 15040, 17672, 21808, 22090, 27260, 35344, 43616, 44180, 54520, 64061, 70688, 87232, 88360, 109040, 128122, 141376, 176720, 218080, 256244, 320305, 353440, 436160, 512488, 640610, 706880, 1024976, 1281220, 2049952, 2562440, 4099904, 5124880, 10249760, 20499520]

約数ペア:

[(1, 20499520), (2, 10249760), (4, 5124880), (5, 4099904), (8, 2562440), (10, 2049952), (16, 1281220), (20, 1024976), (29, 706880), (32, 640610), (40, 512488), (47, 436160), (58, 353440), (64, 320305), (80, 256244), (94, 218080), (116, 176720), (145, 141376), (160, 128122), (188, 109040), (232, 88360), (235, 87232), (290, 70688), (320, 64061), (376, 54520), (464, 44180), (470, 43616), (580, 35344), (752, 27260), (928, 22090), (940, 21808), (1160, 17672), (1363, 15040), (1504, 13630), (1856, 11045), (1880, 10904), (2209, 9280), (2320, 8836), (2726, 7520), (3008, 6815), (3760, 5452), (4418, 4640)]