17781777

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{421}}^1$

素因数の和:478

約数の個数: 36

約数和(自身を含む): 29262324

約数和(自身を除く): 11480547

約数列:

[1, 3, 9, 13, 19, 39, 57, 117, 171, 247, 361, 421, 741, 1083, 1263, 2223, 3249, 3789, 4693, 5473, 7999, 14079, 16419, 23997, 42237, 49257, 71991, 103987, 151981, 311961, 455943, 935883, 1367829, 1975753, 5927259, 17781777]

約数ペア:

[(1, 17781777), (3, 5927259), (9, 1975753), (13, 1367829), (19, 935883), (39, 455943), (57, 311961), (117, 151981), (171, 103987), (247, 71991), (361, 49257), (421, 42237), (741, 23997), (1083, 16419), (1263, 14079), (2223, 7999), (3249, 5473), (3789, 4693)]