21278740

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{21713}}^1$

素因数の和:21736

約数の個数: 36

約数和(自身を含む): 51983316

約数和(自身を除く): 30704576

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 21713, 43426, 86852, 108565, 151991, 217130, 303982, 434260, 607964, 759955, 1063937, 1519910, 2127874, 3039820, 4255748, 5319685, 10639370, 21278740]

約数ペア:

[(1, 21278740), (2, 10639370), (4, 5319685), (5, 4255748), (7, 3039820), (10, 2127874), (14, 1519910), (20, 1063937), (28, 759955), (35, 607964), (49, 434260), (70, 303982), (98, 217130), (140, 151991), (196, 108565), (245, 86852), (490, 43426), (980, 21713)]