21742779

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{241}}^1$

素因数の和:351

約数の個数: 32

約数和(自身を含む): 32408640

約数和(自身を除く): 10665861

約数列:

[1, 3, 17, 29, 51, 61, 87, 183, 241, 493, 723, 1037, 1479, 1769, 3111, 4097, 5307, 6989, 12291, 14701, 20967, 30073, 44103, 90219, 118813, 249917, 356439, 426329, 749751, 1278987, 7247593, 21742779]

約数ペア:

[(1, 21742779), (3, 7247593), (17, 1278987), (29, 749751), (51, 426329), (61, 356439), (87, 249917), (183, 118813), (241, 90219), (493, 44103), (723, 30073), (1037, 20967), (1479, 14701), (1769, 12291), (3111, 6989), (4097, 5307)]