21705180

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{51679}}^1$

素因数の和:51698

約数の個数: 48

約数和(自身を含む): 69457920

約数和(自身を除く): 47752740

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, 51679, 103358, 155037, 206716, 258395, 310074, 361753, 516790, 620148, 723506, 775185, 1033580, 1085259, 1447012, 1550370, 1808765, 2170518, 3100740, 3617530, 4341036, 5426295, 7235060, 10852590, 21705180]

約数ペア:

[(1, 21705180), (2, 10852590), (3, 7235060), (4, 5426295), (5, 4341036), (6, 3617530), (7, 3100740), (10, 2170518), (12, 1808765), (14, 1550370), (15, 1447012), (20, 1085259), (21, 1033580), (28, 775185), (30, 723506), (35, 620148), (42, 516790), (60, 361753), (70, 310074), (84, 258395), (105, 206716), (140, 155037), (210, 103358), (420, 51679)]