20399520

素因数分解:

$2^5\times 3^1\times 5^1\times {\mathrm{42499}}^1$

素因数の和:42517

約数の個数: 48

約数和(自身を含む): 64260000

約数和(自身を除く): 43860480

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 60, 80, 96, 120, 160, 240, 480, 42499, 84998, 127497, 169996, 212495, 254994, 339992, 424990, 509988, 637485, 679984, 849980, 1019976, 1274970, 1359968, 1699960, 2039952, 2549940, 3399920, 4079904, 5099880, 6799840, 10199760, 20399520]

約数ペア:

[(1, 20399520), (2, 10199760), (3, 6799840), (4, 5099880), (5, 4079904), (6, 3399920), (8, 2549940), (10, 2039952), (12, 1699960), (15, 1359968), (16, 1274970), (20, 1019976), (24, 849980), (30, 679984), (32, 637485), (40, 509988), (48, 424990), (60, 339992), (80, 254994), (96, 212495), (120, 169996), (160, 127497), (240, 84998), (480, 42499)]