2840740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{103}}^1\times {\mathrm{197}}^1$

素因数の和:316

約数の個数: 48

約数和(自身を含む): 6918912

約数和(自身を除く): 4078172

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 103, 140, 197, 206, 394, 412, 515, 721, 788, 985, 1030, 1379, 1442, 1970, 2060, 2758, 2884, 3605, 3940, 5516, 6895, 7210, 13790, 14420, 20291, 27580, 40582, 81164, 101455, 142037, 202910, 284074, 405820, 568148, 710185, 1420370, 2840740]

約数ペア:

[(1, 2840740), (2, 1420370), (4, 710185), (5, 568148), (7, 405820), (10, 284074), (14, 202910), (20, 142037), (28, 101455), (35, 81164), (70, 40582), (103, 27580), (140, 20291), (197, 14420), (206, 13790), (394, 7210), (412, 6895), (515, 5516), (721, 3940), (788, 3605), (985, 2884), (1030, 2758), (1379, 2060), (1442, 1970)]