21954680

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{1217}}^1$

素因数の和:1280

約数の個数: 64

約数和(自身を含む): 55248480

約数和(自身を除く): 33293800

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 41, 44, 55, 82, 88, 110, 164, 205, 220, 328, 410, 440, 451, 820, 902, 1217, 1640, 1804, 2255, 2434, 3608, 4510, 4868, 6085, 9020, 9736, 12170, 13387, 18040, 24340, 26774, 48680, 49897, 53548, 66935, 99794, 107096, 133870, 199588, 249485, 267740, 399176, 498970, 535480, 548867, 997940, 1097734, 1995880, 2195468, 2744335, 4390936, 5488670, 10977340, 21954680]

約数ペア:

[(1, 21954680), (2, 10977340), (4, 5488670), (5, 4390936), (8, 2744335), (10, 2195468), (11, 1995880), (20, 1097734), (22, 997940), (40, 548867), (41, 535480), (44, 498970), (55, 399176), (82, 267740), (88, 249485), (110, 199588), (164, 133870), (205, 107096), (220, 99794), (328, 66935), (410, 53548), (440, 49897), (451, 48680), (820, 26774), (902, 24340), (1217, 18040), (1640, 13387), (1804, 12170), (2255, 9736), (2434, 9020), (3608, 6085), (4510, 4868)]