20872740

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{49697}}^1$

素因数の和:49716

約数の個数: 48

約数和(自身を含む): 66794112

約数和(自身を除く): 45921372

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, 49697, 99394, 149091, 198788, 248485, 298182, 347879, 496970, 596364, 695758, 745455, 993940, 1043637, 1391516, 1490910, 1739395, 2087274, 2981820, 3478790, 4174548, 5218185, 6957580, 10436370, 20872740]

約数ペア:

[(1, 20872740), (2, 10436370), (3, 6957580), (4, 5218185), (5, 4174548), (6, 3478790), (7, 2981820), (10, 2087274), (12, 1739395), (14, 1490910), (15, 1391516), (20, 1043637), (21, 993940), (28, 745455), (30, 695758), (35, 596364), (42, 496970), (60, 347879), (70, 298182), (84, 248485), (105, 198788), (140, 149091), (210, 99394), (420, 49697)]