19999920

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{167}}^1\times {\mathrm{499}}^1$

素因数の和:682

約数の個数: 80

約数和(自身を含む): 62496000

約数和(自身を除く): 42496080

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 167, 240, 334, 499, 501, 668, 835, 998, 1002, 1336, 1497, 1670, 1996, 2004, 2495, 2505, 2672, 2994, 3340, 3992, 4008, 4990, 5010, 5988, 6680, 7485, 7984, 8016, 9980, 10020, 11976, 13360, 14970, 19960, 20040, 23952, 29940, 39920, 40080, 59880, 83333, 119760, 166666, 249999, 333332, 416665, 499998, 666664, 833330, 999996, 1249995, 1333328, 1666660, 1999992, 2499990, 3333320, 3999984, 4999980, 6666640, 9999960, 19999920]

約数ペア:

[(1, 19999920), (2, 9999960), (3, 6666640), (4, 4999980), (5, 3999984), (6, 3333320), (8, 2499990), (10, 1999992), (12, 1666660), (15, 1333328), (16, 1249995), (20, 999996), (24, 833330), (30, 666664), (40, 499998), (48, 416665), (60, 333332), (80, 249999), (120, 166666), (167, 119760), (240, 83333), (334, 59880), (499, 40080), (501, 39920), (668, 29940), (835, 23952), (998, 20040), (1002, 19960), (1336, 14970), (1497, 13360), (1670, 11976), (1996, 10020), (2004, 9980), (2495, 8016), (2505, 7984), (2672, 7485), (2994, 6680), (3340, 5988), (3992, 5010), (4008, 4990)]