1820900

素因数分解:

$2^2\times 5^2\times {\mathrm{131}}^1\times {\mathrm{139}}^1$

素因数の和:284

約数の個数: 36

約数和(自身を含む): 4010160

約数和(自身を除く): 2189260

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 131, 139, 262, 278, 524, 556, 655, 695, 1310, 1390, 2620, 2780, 3275, 3475, 6550, 6950, 13100, 13900, 18209, 36418, 72836, 91045, 182090, 364180, 455225, 910450, 1820900]

約数ペア:

[(1, 1820900), (2, 910450), (4, 455225), (5, 364180), (10, 182090), (20, 91045), (25, 72836), (50, 36418), (100, 18209), (131, 13900), (139, 13100), (262, 6950), (278, 6550), (524, 3475), (556, 3275), (655, 2780), (695, 2620), (1310, 1390)]