21707140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{11927}}^1$

素因数の和:11956

約数の個数: 48

約数和(自身を含む): 56109312

約数和(自身を除く): 34402172

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820, 11927, 23854, 47708, 59635, 83489, 119270, 155051, 166978, 238540, 310102, 333956, 417445, 620204, 775255, 834890, 1085357, 1550510, 1669780, 2170714, 3101020, 4341428, 5426785, 10853570, 21707140]

約数ペア:

[(1, 21707140), (2, 10853570), (4, 5426785), (5, 4341428), (7, 3101020), (10, 2170714), (13, 1669780), (14, 1550510), (20, 1085357), (26, 834890), (28, 775255), (35, 620204), (52, 417445), (65, 333956), (70, 310102), (91, 238540), (130, 166978), (140, 155051), (182, 119270), (260, 83489), (364, 59635), (455, 47708), (910, 23854), (1820, 11927)]