21195020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13763}}^1$

素因数の和:13790

約数の個数: 48

約数和(自身を含む): 55496448

約数和(自身を除く): 34301428

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1540, 13763, 27526, 55052, 68815, 96341, 137630, 151393, 192682, 275260, 302786, 385364, 481705, 605572, 756965, 963410, 1059751, 1513930, 1926820, 2119502, 3027860, 4239004, 5298755, 10597510, 21195020]

約数ペア:

[(1, 21195020), (2, 10597510), (4, 5298755), (5, 4239004), (7, 3027860), (10, 2119502), (11, 1926820), (14, 1513930), (20, 1059751), (22, 963410), (28, 756965), (35, 605572), (44, 481705), (55, 385364), (70, 302786), (77, 275260), (110, 192682), (140, 151393), (154, 137630), (220, 96341), (308, 68815), (385, 55052), (770, 27526), (1540, 13763)]