20789600

素因数分解:

$2^5\times 5^2\times {\mathrm{13}}^1\times {\mathrm{1999}}^1$

素因数の和:2032

約数の個数: 72

約数和(自身を含む): 54684000

約数和(自身を除く): 33894400

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 32, 40, 50, 52, 65, 80, 100, 104, 130, 160, 200, 208, 260, 325, 400, 416, 520, 650, 800, 1040, 1300, 1999, 2080, 2600, 3998, 5200, 7996, 9995, 10400, 15992, 19990, 25987, 31984, 39980, 49975, 51974, 63968, 79960, 99950, 103948, 129935, 159920, 199900, 207896, 259870, 319840, 399800, 415792, 519740, 649675, 799600, 831584, 1039480, 1299350, 1599200, 2078960, 2598700, 4157920, 5197400, 10394800, 20789600]

約数ペア:

[(1, 20789600), (2, 10394800), (4, 5197400), (5, 4157920), (8, 2598700), (10, 2078960), (13, 1599200), (16, 1299350), (20, 1039480), (25, 831584), (26, 799600), (32, 649675), (40, 519740), (50, 415792), (52, 399800), (65, 319840), (80, 259870), (100, 207896), (104, 199900), (130, 159920), (160, 129935), (200, 103948), (208, 99950), (260, 79960), (325, 63968), (400, 51974), (416, 49975), (520, 39980), (650, 31984), (800, 25987), (1040, 19990), (1300, 15992), (1999, 10400), (2080, 9995), (2600, 7996), (3998, 5200)]