21895580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{5393}}^1$

素因数の和:5438

約数の個数: 48

約数和(自身を含む): 54371520

約数和(自身を除く): 32475940

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, 5393, 10786, 21572, 26965, 37751, 53930, 75502, 107860, 151004, 156397, 188755, 312794, 377510, 625588, 755020, 781985, 1094779, 1563970, 2189558, 3127940, 4379116, 5473895, 10947790, 21895580]

約数ペア:

[(1, 21895580), (2, 10947790), (4, 5473895), (5, 4379116), (7, 3127940), (10, 2189558), (14, 1563970), (20, 1094779), (28, 781985), (29, 755020), (35, 625588), (58, 377510), (70, 312794), (116, 188755), (140, 156397), (145, 151004), (203, 107860), (290, 75502), (406, 53930), (580, 37751), (812, 26965), (1015, 21572), (2030, 10786), (4060, 5393)]