21742140

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{51767}}^1$

素因数の和:51786

約数の個数: 48

約数和(自身を含む): 69576192

約数和(自身を除く): 47834052

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, 51767, 103534, 155301, 207068, 258835, 310602, 362369, 517670, 621204, 724738, 776505, 1035340, 1087107, 1449476, 1553010, 1811845, 2174214, 3106020, 3623690, 4348428, 5435535, 7247380, 10871070, 21742140]

約数ペア:

[(1, 21742140), (2, 10871070), (3, 7247380), (4, 5435535), (5, 4348428), (6, 3623690), (7, 3106020), (10, 2174214), (12, 1811845), (14, 1553010), (15, 1449476), (20, 1087107), (21, 1035340), (28, 776505), (30, 724738), (35, 621204), (42, 517670), (60, 362369), (70, 310602), (84, 258835), (105, 207068), (140, 155301), (210, 103534), (420, 51767)]