21097153

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{227}}^1$

素因数の和:333

約数の個数: 32

約数和(自身を含む): 28366848

約数和(自身を除く): 7269695

約数列:

[1, 7, 11, 17, 71, 77, 119, 187, 227, 497, 781, 1207, 1309, 1589, 2497, 3859, 5467, 8449, 13277, 16117, 17479, 27013, 42449, 92939, 112819, 177287, 273989, 297143, 1241009, 1917923, 3013879, 21097153]

約数ペア:

[(1, 21097153), (7, 3013879), (11, 1917923), (17, 1241009), (71, 297143), (77, 273989), (119, 177287), (187, 112819), (227, 92939), (497, 42449), (781, 27013), (1207, 17479), (1309, 16117), (1589, 13277), (2497, 8449), (3859, 5467)]