28013860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{401}}^1\times {\mathrm{499}}^1$

素因数の和:916

約数の個数: 48

約数和(自身を含む): 67536000

約数和(自身を除く): 39522140

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 401, 499, 802, 998, 1604, 1996, 2005, 2495, 2807, 3493, 4010, 4990, 5614, 6986, 8020, 9980, 11228, 13972, 14035, 17465, 28070, 34930, 56140, 69860, 200099, 400198, 800396, 1000495, 1400693, 2000990, 2801386, 4001980, 5602772, 7003465, 14006930, 28013860]

約数ペア:

[(1, 28013860), (2, 14006930), (4, 7003465), (5, 5602772), (7, 4001980), (10, 2801386), (14, 2000990), (20, 1400693), (28, 1000495), (35, 800396), (70, 400198), (140, 200099), (401, 69860), (499, 56140), (802, 34930), (998, 28070), (1604, 17465), (1996, 14035), (2005, 13972), (2495, 11228), (2807, 9980), (3493, 8020), (4010, 6986), (4990, 5614)]