18866540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{12251}}^1$

素因数の和:12278

約数の個数: 48

約数和(自身を含む): 49400064

約数和(自身を除く): 30533524

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, 12251, 24502, 49004, 61255, 85757, 122510, 134761, 171514, 245020, 269522, 343028, 428785, 539044, 673805, 857570, 943327, 1347610, 1715140, 1886654, 2695220, 3773308, 4716635, 9433270, 18866540]

約数ペア:

[(1, 18866540), (2, 9433270), (4, 4716635), (5, 3773308), (7, 2695220), (10, 1886654), (11, 1715140), (14, 1347610), (20, 943327), (22, 857570), (28, 673805), (35, 539044), (44, 428785), (55, 343028), (70, 269522), (77, 245020), (110, 171514), (140, 134761), (154, 122510), (220, 85757), (308, 61255), (385, 49004), (770, 24502), (1540, 12251)]