19710200

素因数分解:

$2^3\times 5^2\times {\mathrm{139}}^1\times {\mathrm{709}}^1$

素因数の和:864

約数の個数: 48

約数和(自身を含む): 46221000

約数和(自身を除く): 26510800

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 139, 200, 278, 556, 695, 709, 1112, 1390, 1418, 2780, 2836, 3475, 3545, 5560, 5672, 6950, 7090, 13900, 14180, 17725, 27800, 28360, 35450, 70900, 98551, 141800, 197102, 394204, 492755, 788408, 985510, 1971020, 2463775, 3942040, 4927550, 9855100, 19710200]

約数ペア:

[(1, 19710200), (2, 9855100), (4, 4927550), (5, 3942040), (8, 2463775), (10, 1971020), (20, 985510), (25, 788408), (40, 492755), (50, 394204), (100, 197102), (139, 141800), (200, 98551), (278, 70900), (556, 35450), (695, 28360), (709, 27800), (1112, 17725), (1390, 14180), (1418, 13900), (2780, 7090), (2836, 6950), (3475, 5672), (3545, 5560)]