21445820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{2267}}^1$

素因数の和:2330

約数の個数: 48

約数和(自身を含む): 50295168

約数和(自身を除く): 28849348

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 43, 44, 55, 86, 110, 172, 215, 220, 430, 473, 860, 946, 1892, 2267, 2365, 4534, 4730, 9068, 9460, 11335, 22670, 24937, 45340, 49874, 97481, 99748, 124685, 194962, 249370, 389924, 487405, 498740, 974810, 1072291, 1949620, 2144582, 4289164, 5361455, 10722910, 21445820]

約数ペア:

[(1, 21445820), (2, 10722910), (4, 5361455), (5, 4289164), (10, 2144582), (11, 1949620), (20, 1072291), (22, 974810), (43, 498740), (44, 487405), (55, 389924), (86, 249370), (110, 194962), (172, 124685), (215, 99748), (220, 97481), (430, 49874), (473, 45340), (860, 24937), (946, 22670), (1892, 11335), (2267, 9460), (2365, 9068), (4534, 4730)]