21338020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{4217}}^1$

素因数の和:4260

約数の個数: 48

約数和(自身を含む): 51020928

約数和(自身を除く): 29682908

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 23, 44, 46, 55, 92, 110, 115, 220, 230, 253, 460, 506, 1012, 1265, 2530, 4217, 5060, 8434, 16868, 21085, 42170, 46387, 84340, 92774, 96991, 185548, 193982, 231935, 387964, 463870, 484955, 927740, 969910, 1066901, 1939820, 2133802, 4267604, 5334505, 10669010, 21338020]

約数ペア:

[(1, 21338020), (2, 10669010), (4, 5334505), (5, 4267604), (10, 2133802), (11, 1939820), (20, 1066901), (22, 969910), (23, 927740), (44, 484955), (46, 463870), (55, 387964), (92, 231935), (110, 193982), (115, 185548), (220, 96991), (230, 92774), (253, 84340), (460, 46387), (506, 42170), (1012, 21085), (1265, 16868), (2530, 8434), (4217, 5060)]