21609213

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{311}}^1$

素因数の和:409

約数の個数: 32

約数和(自身を含む): 32348160

約数和(自身を除く): 10738947

約数列:

[1, 3, 19, 23, 53, 57, 69, 159, 311, 437, 933, 1007, 1219, 1311, 3021, 3657, 5909, 7153, 16483, 17727, 21459, 23161, 49449, 69483, 135907, 313177, 379109, 407721, 939531, 1137327, 7203071, 21609213]

約数ペア:

[(1, 21609213), (3, 7203071), (19, 1137327), (23, 939531), (53, 407721), (57, 379109), (69, 313177), (159, 135907), (311, 69483), (437, 49449), (933, 23161), (1007, 21459), (1219, 17727), (1311, 16483), (3021, 7153), (3657, 5909)]