21003213

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{419}}^1$

素因数の和:478

約数の個数: 48

約数和(自身を含む): 36771840

約数和(自身を除く): 15768627

約数列:

[1, 3, 7, 11, 21, 31, 33, 49, 77, 93, 147, 217, 231, 341, 419, 539, 651, 1023, 1257, 1519, 1617, 2387, 2933, 4557, 4609, 7161, 8799, 12989, 13827, 16709, 20531, 32263, 38967, 50127, 61593, 90923, 96789, 142879, 225841, 272769, 428637, 636461, 677523, 1000153, 1909383, 3000459, 7001071, 21003213]

約数ペア:

[(1, 21003213), (3, 7001071), (7, 3000459), (11, 1909383), (21, 1000153), (31, 677523), (33, 636461), (49, 428637), (77, 272769), (93, 225841), (147, 142879), (217, 96789), (231, 90923), (341, 61593), (419, 50127), (539, 38967), (651, 32263), (1023, 20531), (1257, 16709), (1519, 13827), (1617, 12989), (2387, 8799), (2933, 7161), (4557, 4609)]