20161621280

素因数分解:

$2^5\times 5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{140167}}^1$

素因数の和:140242

約数の個数: 96

約数和(自身を含む): 50864163840

約数和(自身を除く): 30702542560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 31, 32, 40, 58, 62, 80, 116, 124, 145, 155, 160, 232, 248, 290, 310, 464, 496, 580, 620, 899, 928, 992, 1160, 1240, 1798, 2320, 2480, 3596, 4495, 4640, 4960, 7192, 8990, 14384, 17980, 28768, 35960, 71920, 140167, 143840, 280334, 560668, 700835, 1121336, 1401670, 2242672, 2803340, 4064843, 4345177, 4485344, 5606680, 8129686, 8690354, 11213360, 16259372, 17380708, 20324215, 21725885, 22426720, 32518744, 34761416, 40648430, 43451770, 65037488, 69522832, 81296860, 86903540, 126010133, 130074976, 139045664, 162593720, 173807080, 252020266, 325187440, 347614160, 504040532, 630050665, 650374880, 695228320, 1008081064, 1260101330, 2016162128, 2520202660, 4032324256, 5040405320, 10080810640, 20161621280]

約数ペア:

[(1, 20161621280), (2, 10080810640), (4, 5040405320), (5, 4032324256), (8, 2520202660), (10, 2016162128), (16, 1260101330), (20, 1008081064), (29, 695228320), (31, 650374880), (32, 630050665), (40, 504040532), (58, 347614160), (62, 325187440), (80, 252020266), (116, 173807080), (124, 162593720), (145, 139045664), (155, 130074976), (160, 126010133), (232, 86903540), (248, 81296860), (290, 69522832), (310, 65037488), (464, 43451770), (496, 40648430), (580, 34761416), (620, 32518744), (899, 22426720), (928, 21725885), (992, 20324215), (1160, 17380708), (1240, 16259372), (1798, 11213360), (2320, 8690354), (2480, 8129686), (3596, 5606680), (4495, 4485344), (4640, 4345177), (4960, 4064843), (7192, 2803340), (8990, 2242672), (14384, 1401670), (17980, 1121336), (28768, 700835), (35960, 560668), (71920, 280334), (140167, 143840)]