198940480

素因数分解:

$2^6\times 5^1\times {\mathrm{311}}^1\times {\mathrm{1999}}^1$

素因数の和:2327

約数の個数: 56

約数和(自身を含む): 475488000

約数和(自身を除く): 276547520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 311, 320, 622, 1244, 1555, 1999, 2488, 3110, 3998, 4976, 6220, 7996, 9952, 9995, 12440, 15992, 19904, 19990, 24880, 31984, 39980, 49760, 63968, 79960, 99520, 127936, 159920, 319840, 621689, 639680, 1243378, 2486756, 3108445, 4973512, 6216890, 9947024, 12433780, 19894048, 24867560, 39788096, 49735120, 99470240, 198940480]

約数ペア:

[(1, 198940480), (2, 99470240), (4, 49735120), (5, 39788096), (8, 24867560), (10, 19894048), (16, 12433780), (20, 9947024), (32, 6216890), (40, 4973512), (64, 3108445), (80, 2486756), (160, 1243378), (311, 639680), (320, 621689), (622, 319840), (1244, 159920), (1555, 127936), (1999, 99520), (2488, 79960), (3110, 63968), (3998, 49760), (4976, 39980), (6220, 31984), (7996, 24880), (9952, 19990), (9995, 19904), (12440, 15992)]