18987400

素因数分解:

$2^3\times 5^2\times {\mathrm{139}}^1\times {\mathrm{683}}^1$

素因数の和:838

約数の個数: 48

約数和(自身を含む): 44528400

約数和(自身を除く): 25541000

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 139, 200, 278, 556, 683, 695, 1112, 1366, 1390, 2732, 2780, 3415, 3475, 5464, 5560, 6830, 6950, 13660, 13900, 17075, 27320, 27800, 34150, 68300, 94937, 136600, 189874, 379748, 474685, 759496, 949370, 1898740, 2373425, 3797480, 4746850, 9493700, 18987400]

約数ペア:

[(1, 18987400), (2, 9493700), (4, 4746850), (5, 3797480), (8, 2373425), (10, 1898740), (20, 949370), (25, 759496), (40, 474685), (50, 379748), (100, 189874), (139, 136600), (200, 94937), (278, 68300), (556, 34150), (683, 27800), (695, 27320), (1112, 17075), (1366, 13900), (1390, 13660), (2732, 6950), (2780, 6830), (3415, 5560), (3475, 5464)]