21511040

素因数分解:

$2^7\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1$

素因数の和:128

約数の個数: 128

約数和(自身を含む): 56916000

約数和(自身を除く): 35404960

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 29, 32, 38, 40, 58, 61, 64, 76, 80, 95, 116, 122, 128, 145, 152, 160, 190, 232, 244, 290, 304, 305, 320, 380, 464, 488, 551, 580, 608, 610, 640, 760, 928, 976, 1102, 1159, 1160, 1216, 1220, 1520, 1769, 1856, 1952, 2204, 2318, 2320, 2432, 2440, 2755, 3040, 3538, 3712, 3904, 4408, 4636, 4640, 4880, 5510, 5795, 6080, 7076, 7808, 8816, 8845, 9272, 9280, 9760, 11020, 11590, 12160, 14152, 17632, 17690, 18544, 18560, 19520, 22040, 23180, 28304, 33611, 35264, 35380, 37088, 39040, 44080, 46360, 56608, 67222, 70528, 70760, 74176, 88160, 92720, 113216, 134444, 141520, 148352, 168055, 176320, 185440, 226432, 268888, 283040, 336110, 352640, 370880, 537776, 566080, 672220, 741760, 1075552, 1132160, 1344440, 2151104, 2688880, 4302208, 5377760, 10755520, 21511040]

約数ペア:

[(1, 21511040), (2, 10755520), (4, 5377760), (5, 4302208), (8, 2688880), (10, 2151104), (16, 1344440), (19, 1132160), (20, 1075552), (29, 741760), (32, 672220), (38, 566080), (40, 537776), (58, 370880), (61, 352640), (64, 336110), (76, 283040), (80, 268888), (95, 226432), (116, 185440), (122, 176320), (128, 168055), (145, 148352), (152, 141520), (160, 134444), (190, 113216), (232, 92720), (244, 88160), (290, 74176), (304, 70760), (305, 70528), (320, 67222), (380, 56608), (464, 46360), (488, 44080), (551, 39040), (580, 37088), (608, 35380), (610, 35264), (640, 33611), (760, 28304), (928, 23180), (976, 22040), (1102, 19520), (1159, 18560), (1160, 18544), (1216, 17690), (1220, 17632), (1520, 14152), (1769, 12160), (1856, 11590), (1952, 11020), (2204, 9760), (2318, 9280), (2320, 9272), (2432, 8845), (2440, 8816), (2755, 7808), (3040, 7076), (3538, 6080), (3712, 5795), (3904, 5510), (4408, 4880), (4636, 4640)]