21563920

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{5501}}^1$

素因数の和:5528

約数の個数: 60

約数和(自身を含む): 58332204

約数和(自身を除く): 36768284

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 392, 490, 560, 784, 980, 1960, 3920, 5501, 11002, 22004, 27505, 38507, 44008, 55010, 77014, 88016, 110020, 154028, 192535, 220040, 269549, 308056, 385070, 440080, 539098, 616112, 770140, 1078196, 1347745, 1540280, 2156392, 2695490, 3080560, 4312784, 5390980, 10781960, 21563920]

約数ペア:

[(1, 21563920), (2, 10781960), (4, 5390980), (5, 4312784), (7, 3080560), (8, 2695490), (10, 2156392), (14, 1540280), (16, 1347745), (20, 1078196), (28, 770140), (35, 616112), (40, 539098), (49, 440080), (56, 385070), (70, 308056), (80, 269549), (98, 220040), (112, 192535), (140, 154028), (196, 110020), (245, 88016), (280, 77014), (392, 55010), (490, 44008), (560, 38507), (784, 27505), (980, 22004), (1960, 11002), (3920, 5501)]