21737289

素因数分解:

$3^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{239}}^1$

素因数の和:381

約数の個数: 32

約数和(自身を含む): 34283520

約数和(自身を除く): 12546231

約数列:

[1, 3, 7, 21, 61, 71, 183, 213, 239, 427, 497, 717, 1281, 1491, 1673, 4331, 5019, 12993, 14579, 16969, 30317, 43737, 50907, 90951, 102053, 118783, 306159, 356349, 1035109, 3105327, 7245763, 21737289]

約数ペア:

[(1, 21737289), (3, 7245763), (7, 3105327), (21, 1035109), (61, 356349), (71, 306159), (183, 118783), (213, 102053), (239, 90951), (427, 50907), (497, 43737), (717, 30317), (1281, 16969), (1491, 14579), (1673, 12993), (4331, 5019)]