28722267

素因数分解:

$3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{79}}^1\times {\mathrm{199}}^1$

素因数の和:320

約数の個数: 48

約数和(自身を含む): 49920000

約数和(自身を除く): 21197733

約数列:

[1, 3, 7, 9, 21, 29, 63, 79, 87, 199, 203, 237, 261, 553, 597, 609, 711, 1393, 1659, 1791, 1827, 2291, 4179, 4977, 5771, 6873, 12537, 15721, 16037, 17313, 20619, 40397, 47163, 48111, 51939, 110047, 121191, 141489, 144333, 330141, 363573, 455909, 990423, 1367727, 3191363, 4103181, 9574089, 28722267]

約数ペア:

[(1, 28722267), (3, 9574089), (7, 4103181), (9, 3191363), (21, 1367727), (29, 990423), (63, 455909), (79, 363573), (87, 330141), (199, 144333), (203, 141489), (237, 121191), (261, 110047), (553, 51939), (597, 48111), (609, 47163), (711, 40397), (1393, 20619), (1659, 17313), (1791, 16037), (1827, 15721), (2291, 12537), (4179, 6873), (4977, 5771)]