1280860

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{1307}}^1$

素因数の和:1330

約数の個数: 36

約数和(自身を含む): 3131352

約数和(自身を除く): 1850492

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 1307, 2614, 5228, 6535, 9149, 13070, 18298, 26140, 36596, 45745, 64043, 91490, 128086, 182980, 256172, 320215, 640430, 1280860]

約数ペア:

[(1, 1280860), (2, 640430), (4, 320215), (5, 256172), (7, 182980), (10, 128086), (14, 91490), (20, 64043), (28, 45745), (35, 36596), (49, 26140), (70, 18298), (98, 13070), (140, 9149), (196, 6535), (245, 5228), (490, 2614), (980, 1307)]