20419400

素因数分解:

$2^3\times 5^2\times {\mathrm{23}}^2\times {\mathrm{193}}^1$

素因数の和:255

約数の個数: 72

約数和(自身を含む): 49886130

約数和(自身を除く): 29466730

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 25, 40, 46, 50, 92, 100, 115, 184, 193, 200, 230, 386, 460, 529, 575, 772, 920, 965, 1058, 1150, 1544, 1930, 2116, 2300, 2645, 3860, 4232, 4439, 4600, 4825, 5290, 7720, 8878, 9650, 10580, 13225, 17756, 19300, 21160, 22195, 26450, 35512, 38600, 44390, 52900, 88780, 102097, 105800, 110975, 177560, 204194, 221950, 408388, 443900, 510485, 816776, 887800, 1020970, 2041940, 2552425, 4083880, 5104850, 10209700, 20419400]

約数ペア:

[(1, 20419400), (2, 10209700), (4, 5104850), (5, 4083880), (8, 2552425), (10, 2041940), (20, 1020970), (23, 887800), (25, 816776), (40, 510485), (46, 443900), (50, 408388), (92, 221950), (100, 204194), (115, 177560), (184, 110975), (193, 105800), (200, 102097), (230, 88780), (386, 52900), (460, 44390), (529, 38600), (575, 35512), (772, 26450), (920, 22195), (965, 21160), (1058, 19300), (1150, 17756), (1544, 13225), (1930, 10580), (2116, 9650), (2300, 8878), (2645, 7720), (3860, 5290), (4232, 4825), (4439, 4600)]