20316681

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{1543}}^1$

素因数の和:1586

約数の個数: 48

約数和(自身を含む): 38538240

約数和(自身を除く): 18221559

約数列:

[1, 3, 7, 9, 11, 19, 21, 33, 57, 63, 77, 99, 133, 171, 209, 231, 399, 627, 693, 1197, 1463, 1543, 1881, 4389, 4629, 10801, 13167, 13887, 16973, 29317, 32403, 50919, 87951, 97209, 118811, 152757, 205219, 263853, 322487, 356433, 615657, 967461, 1069299, 1846971, 2257409, 2902383, 6772227, 20316681]

約数ペア:

[(1, 20316681), (3, 6772227), (7, 2902383), (9, 2257409), (11, 1846971), (19, 1069299), (21, 967461), (33, 615657), (57, 356433), (63, 322487), (77, 263853), (99, 205219), (133, 152757), (171, 118811), (209, 97209), (231, 87951), (399, 50919), (627, 32403), (693, 29317), (1197, 16973), (1463, 13887), (1543, 13167), (1881, 10801), (4389, 4629)]