20783140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{5119}}^1$

素因数の和:5164

約数の個数: 48

約数和(自身を含む): 51609600

約数和(自身を除く): 30826460

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 35, 58, 70, 116, 140, 145, 203, 290, 406, 580, 812, 1015, 2030, 4060, 5119, 10238, 20476, 25595, 35833, 51190, 71666, 102380, 143332, 148451, 179165, 296902, 358330, 593804, 716660, 742255, 1039157, 1484510, 2078314, 2969020, 4156628, 5195785, 10391570, 20783140]

約数ペア:

[(1, 20783140), (2, 10391570), (4, 5195785), (5, 4156628), (7, 2969020), (10, 2078314), (14, 1484510), (20, 1039157), (28, 742255), (29, 716660), (35, 593804), (58, 358330), (70, 296902), (116, 179165), (140, 148451), (145, 143332), (203, 102380), (290, 71666), (406, 51190), (580, 35833), (812, 25595), (1015, 20476), (2030, 10238), (4060, 5119)]