213640

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{109}}^1$

素因数の和:134

約数の個数: 48

約数和(自身を含む): 564300

約数和(自身を除く): 350660

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 109, 140, 196, 218, 245, 280, 392, 436, 490, 545, 763, 872, 980, 1090, 1526, 1960, 2180, 3052, 3815, 4360, 5341, 6104, 7630, 10682, 15260, 21364, 26705, 30520, 42728, 53410, 106820, 213640]

約数ペア:

[(1, 213640), (2, 106820), (4, 53410), (5, 42728), (7, 30520), (8, 26705), (10, 21364), (14, 15260), (20, 10682), (28, 7630), (35, 6104), (40, 5341), (49, 4360), (56, 3815), (70, 3052), (98, 2180), (109, 1960), (140, 1526), (196, 1090), (218, 980), (245, 872), (280, 763), (392, 545), (436, 490)]