21315272

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{43}}^2\times {\mathrm{131}}^1$

素因数の和:234

約数の個数: 48

約数和(自身を含む): 44977680

約数和(自身を除く): 23662408

約数列:

[1, 2, 4, 8, 11, 22, 43, 44, 86, 88, 131, 172, 262, 344, 473, 524, 946, 1048, 1441, 1849, 1892, 2882, 3698, 3784, 5633, 5764, 7396, 11266, 11528, 14792, 20339, 22532, 40678, 45064, 61963, 81356, 123926, 162712, 242219, 247852, 484438, 495704, 968876, 1937752, 2664409, 5328818, 10657636, 21315272]

約数ペア:

[(1, 21315272), (2, 10657636), (4, 5328818), (8, 2664409), (11, 1937752), (22, 968876), (43, 495704), (44, 484438), (86, 247852), (88, 242219), (131, 162712), (172, 123926), (262, 81356), (344, 61963), (473, 45064), (524, 40678), (946, 22532), (1048, 20339), (1441, 14792), (1849, 11528), (1892, 11266), (2882, 7396), (3698, 5764), (3784, 5633)]