20404720

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{83}}^1\times {\mathrm{439}}^1$

素因数の和:542

約数の個数: 80

約数和(自身を含む): 54996480

約数和(自身を除く): 34591760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 83, 112, 140, 166, 280, 332, 415, 439, 560, 581, 664, 830, 878, 1162, 1328, 1660, 1756, 2195, 2324, 2905, 3073, 3320, 3512, 4390, 4648, 5810, 6146, 6640, 7024, 8780, 9296, 11620, 12292, 15365, 17560, 23240, 24584, 30730, 35120, 36437, 46480, 49168, 61460, 72874, 122920, 145748, 182185, 245840, 255059, 291496, 364370, 510118, 582992, 728740, 1020236, 1275295, 1457480, 2040472, 2550590, 2914960, 4080944, 5101180, 10202360, 20404720]

約数ペア:

[(1, 20404720), (2, 10202360), (4, 5101180), (5, 4080944), (7, 2914960), (8, 2550590), (10, 2040472), (14, 1457480), (16, 1275295), (20, 1020236), (28, 728740), (35, 582992), (40, 510118), (56, 364370), (70, 291496), (80, 255059), (83, 245840), (112, 182185), (140, 145748), (166, 122920), (280, 72874), (332, 61460), (415, 49168), (439, 46480), (560, 36437), (581, 35120), (664, 30730), (830, 24584), (878, 23240), (1162, 17560), (1328, 15365), (1660, 12292), (1756, 11620), (2195, 9296), (2324, 8780), (2905, 7024), (3073, 6640), (3320, 6146), (3512, 5810), (4390, 4648)]