21516740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{8089}}^1$

素因数の和:8124

約数の個数: 48

約数和(自身を含む): 54364800

約数和(自身を除く): 32848060

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 70, 76, 95, 133, 140, 190, 266, 380, 532, 665, 1330, 2660, 8089, 16178, 32356, 40445, 56623, 80890, 113246, 153691, 161780, 226492, 283115, 307382, 566230, 614764, 768455, 1075837, 1132460, 1536910, 2151674, 3073820, 4303348, 5379185, 10758370, 21516740]

約数ペア:

[(1, 21516740), (2, 10758370), (4, 5379185), (5, 4303348), (7, 3073820), (10, 2151674), (14, 1536910), (19, 1132460), (20, 1075837), (28, 768455), (35, 614764), (38, 566230), (70, 307382), (76, 283115), (95, 226492), (133, 161780), (140, 153691), (190, 113246), (266, 80890), (380, 56623), (532, 40445), (665, 32356), (1330, 16178), (2660, 8089)]