20099900

素因数分解:

$2^2\times 5^2\times {\mathrm{29}}^2\times {\mathrm{239}}^1$

素因数の和:311

約数の個数: 54

約数和(自身を含む): 45361680

約数和(自身を除く): 25261780

約数列:

[1, 2, 4, 5, 10, 20, 25, 29, 50, 58, 100, 116, 145, 239, 290, 478, 580, 725, 841, 956, 1195, 1450, 1682, 2390, 2900, 3364, 4205, 4780, 5975, 6931, 8410, 11950, 13862, 16820, 21025, 23900, 27724, 34655, 42050, 69310, 84100, 138620, 173275, 200999, 346550, 401998, 693100, 803996, 1004995, 2009990, 4019980, 5024975, 10049950, 20099900]

約数ペア:

[(1, 20099900), (2, 10049950), (4, 5024975), (5, 4019980), (10, 2009990), (20, 1004995), (25, 803996), (29, 693100), (50, 401998), (58, 346550), (100, 200999), (116, 173275), (145, 138620), (239, 84100), (290, 69310), (478, 42050), (580, 34655), (725, 27724), (841, 23900), (956, 21025), (1195, 16820), (1450, 13862), (1682, 11950), (2390, 8410), (2900, 6931), (3364, 5975), (4205, 4780)]