17780451

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{79}}^1\times {\mathrm{199}}^1$

素因数の和:323

約数の個数: 32

約数和(自身を含む): 26880000

約数和(自身を除く): 9099549

約数列:

[1, 3, 13, 29, 39, 79, 87, 199, 237, 377, 597, 1027, 1131, 2291, 2587, 3081, 5771, 6873, 7761, 15721, 17313, 29783, 47163, 75023, 89349, 204373, 225069, 455909, 613119, 1367727, 5926817, 17780451]

約数ペア:

[(1, 17780451), (3, 5926817), (13, 1367727), (29, 613119), (39, 455909), (79, 225069), (87, 204373), (199, 89349), (237, 75023), (377, 47163), (597, 29783), (1027, 17313), (1131, 15721), (2291, 7761), (2587, 6873), (3081, 5771)]