18662980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{1223}}^1$

素因数の和:1348

約数の個数: 48

約数和(自身を含む): 45239040

約数和(自身を除く): 26576060

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 109, 140, 218, 436, 545, 763, 1090, 1223, 1526, 2180, 2446, 3052, 3815, 4892, 6115, 7630, 8561, 12230, 15260, 17122, 24460, 34244, 42805, 85610, 133307, 171220, 266614, 533228, 666535, 933149, 1333070, 1866298, 2666140, 3732596, 4665745, 9331490, 18662980]

約数ペア:

[(1, 18662980), (2, 9331490), (4, 4665745), (5, 3732596), (7, 2666140), (10, 1866298), (14, 1333070), (20, 933149), (28, 666535), (35, 533228), (70, 266614), (109, 171220), (140, 133307), (218, 85610), (436, 42805), (545, 34244), (763, 24460), (1090, 17122), (1223, 15260), (1526, 12230), (2180, 8561), (2446, 7630), (3052, 6115), (3815, 4892)]