21413480

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{1187}}^1$

素因数の和:1250

約数の個数: 64

約数和(自身を含む): 53887680

約数和(自身を除く): 32474200

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, 1187, 1640, 1804, 2255, 2374, 3608, 4510, 4748, 5935, 9020, 9496, 11870, 13057, 18040, 23740, 26114, 47480, 48667, 52228, 65285, 97334, 104456, 130570, 194668, 243335, 261140, 389336, 486670, 522280, 535337, 973340, 1070674, 1946680, 2141348, 2676685, 4282696, 5353370, 10706740, 21413480]

約数ペア:

[(1, 21413480), (2, 10706740), (4, 5353370), (5, 4282696), (8, 2676685), (10, 2141348), (11, 1946680), (20, 1070674), (22, 973340), (40, 535337), (41, 522280), (44, 486670), (55, 389336), (82, 261140), (88, 243335), (110, 194668), (164, 130570), (205, 104456), (220, 97334), (328, 65285), (410, 52228), (440, 48667), (451, 47480), (820, 26114), (902, 23740), (1187, 18040), (1640, 13057), (1804, 11870), (2255, 9496), (2374, 9020), (3608, 5935), (4510, 4748)]