20945820

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{49871}}^1$

素因数の和:49890

約数の個数: 48

約数和(自身を含む): 67027968

約数和(自身を除く): 46082148

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 49871, 99742, 149613, 199484, 249355, 299226, 349097, 498710, 598452, 698194, 748065, 997420, 1047291, 1396388, 1496130, 1745485, 2094582, 2992260, 3490970, 4189164, 5236455, 6981940, 10472910, 20945820]

約数ペア:

[(1, 20945820), (2, 10472910), (3, 6981940), (4, 5236455), (5, 4189164), (6, 3490970), (7, 2992260), (10, 2094582), (12, 1745485), (14, 1496130), (15, 1396388), (20, 1047291), (21, 997420), (28, 748065), (30, 698194), (35, 598452), (42, 498710), (60, 349097), (70, 299226), (84, 249355), (105, 199484), (140, 149613), (210, 99742), (420, 49871)]