21004671

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{97}}^1\times {\mathrm{131}}^1$

素因数の和:279

約数の個数: 32

約数和(自身を含む): 31046400

約数和(自身を除く): 10041729

約数列:

[1, 3, 19, 29, 57, 87, 97, 131, 291, 393, 551, 1653, 1843, 2489, 2813, 3799, 5529, 7467, 8439, 11397, 12707, 38121, 53447, 72181, 160341, 216543, 241433, 368503, 724299, 1105509, 7001557, 21004671]

約数ペア:

[(1, 21004671), (3, 7001557), (19, 1105509), (29, 724299), (57, 368503), (87, 241433), (97, 216543), (131, 160341), (291, 72181), (393, 53447), (551, 38121), (1653, 12707), (1843, 11397), (2489, 8439), (2813, 7467), (3799, 5529)]